Questions C1 (1562 questions)

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AQA AS Paper 1 AS Paper 2 C1 C2 C3 C4 D1 D2 FP1 FP2 FP3 Further AS Paper 1 Further AS Paper 2 Discrete Further AS Paper 2 Mechanics Further AS Paper 2 Statistics Further Paper 1 Further Paper 2 Further Paper 3 Discrete Further Paper 3 Mechanics Further Paper 3 Statistics M1 M2 M3 Paper 1 Paper 2 Paper 3 S1 S2 S3 CAIE FP1 FP2 Further Paper 1 Further Paper 2 Further Paper 3 Further Paper 4 M1 M2 P1 P2 P3 S1 S2 Edexcel AEA AS Paper 1 AS Paper 2 C1 C12 C2 C3 C34 C4 CP AS CP1 CP2 D1 D2 F1 F2 F3 FD1 FD1 AS FD2 FD2 AS FM1 FM1 AS FM2 FM2 AS FP1 FP1 AS FP2 FP2 AS FP3 FS1 FS1 AS FS2 FS2 AS M1 M2 M3 M4 M5 P1 P2 P3 P4 PMT Mocks PURE Paper 1 Paper 2 Paper 3 S1 S2 S3 S4 OCR AS Pure C1 C2 C3 C4 D1 D2 FD1 AS FM1 AS FP1 FP1 AS FP2 FP3 FS1 AS Further Additional Pure Further Additional Pure AS Further Discrete Further Discrete AS Further Mechanics Further Mechanics AS Further Pure Core 1 Further Pure Core 2 Further Pure Core AS Further Statistics Further Statistics AS H240/01 H240/02 H240/03 M1 M2 M3 M4 PURE S1 S2 S3 S4 OCR MEI AS Paper 1 AS Paper 2 C1 C2 C3 C4 D1 D2 FP1 FP2 FP3 Further Extra Pure Further Mechanics A AS Further Mechanics B AS Further Mechanics Major Further Mechanics Minor Further Numerical Methods Further Pure Core Further Pure Core AS Further Pure with Technology Further Statistics A AS Further Statistics B AS Further Statistics Major Further Statistics Minor M1 M2 M3 M4 Paper 1 Paper 2 Paper 3 S1 S2 S3 S4 Pre-U Pre-U 9794/1 Pre-U 9794/2 Pre-U 9794/3 Pre-U 9795 Pre-U 9795/1 Pre-U 9795/2 WJEC Further Unit 1 Further Unit 2 Further Unit 3 Further Unit 4 Further Unit 5 Further Unit 6 Unit 1 Unit 2 Unit 3 Unit 4
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OCR C1 Q3
6 marks Moderate -0.8
  1. Express \(x^2 - 10x + 27\) in the form \((x + p)^2 + q\). [3]
  2. Sketch the curve with equation \(y = x^2 - 10x + 27\), showing on your sketch
    1. the coordinates of the vertex of the curve,
    2. the coordinates of any points where the curve meets the coordinate axes. [3]
OCR C1 Q4
8 marks Moderate -0.8
The straight line \(l_1\) has gradient 2 and passes through the point with coordinates \((4, -5)\).
  1. Find an equation for \(l_1\) in the form \(y = mx + c\). [2]
The straight line \(l_2\) is perpendicular to the line with equation \(3x - y = 4\) and passes through the point with coordinates \((3, 0)\).
  1. Find an equation for \(l_2\). [3]
  2. Find the coordinates of the point where \(l_1\) and \(l_2\) intersect. [3]
OCR C1 Q5
8 marks Moderate -0.3
Given that the equation $$4x^2 - kx + k - 3 = 0,$$ where \(k\) is a constant, has real roots,
  1. show that $$k^2 - 16k + 48 \geq 0, \quad [2]$$
  2. find the set of possible values of \(k\), [3]
  3. state the smallest value of \(k\) for which the roots are equal and solve the equation when \(k\) takes this value. [3]
OCR C1 Q6
9 marks Moderate -0.8
The points \(P\) and \(Q\) have coordinates \((-2, 6)\) and \((4, -1)\) respectively. Given that \(PQ\) is a diameter of circle \(C\),
  1. find the coordinates of the centre of \(C\), [2]
  2. show that \(C\) has the equation $$x^2 + y^2 - 2x - 5y - 14 = 0. \quad [5]$$
The point \(R\) has coordinates \((2, 7)\).
  1. Show that \(R\) lies on \(C\) and hence, state the size of \(\angle PRQ\) in degrees. [2]
OCR C1 Q7
10 marks Standard +0.3
  1. Describe fully the single transformation that maps the graph of \(y = f(x)\) onto the graph of \(y = f(x - 1)\). [2]
  2. Showing the coordinates of any points of intersection with the coordinate axes and the equations of any asymptotes, sketch the graph of \(y = \frac{1}{x-1}\). [3]
  3. Find the \(x\)-coordinates of any points where the graph of \(y = \frac{1}{x-1}\) intersects the graph of \(y = 2 + \frac{1}{x}\). Give your answers in the form \(a + b\sqrt{3}\), where \(a\) and \(b\) are rational. [5]
OCR C1 Q8
11 marks Moderate -0.3
\includegraphics{figure_8} The diagram shows the curve \(C\) with the equation \(y = x^3 + 3x^2 - 4x\) and the straight line \(l\). The curve \(C\) crosses the \(x\)-axis at the origin, \(O\), and at the points \(A\) and \(B\).
  1. Find the coordinates of \(A\) and \(B\). [3]
The line \(l\) is the tangent to \(C\) at \(O\).
  1. Find an equation for \(l\). [4]
  2. Find the coordinates of the point where \(l\) intersects \(C\) again. [4]
OCR C1 Q9
12 marks Moderate -0.3
The curve with equation \(y = 2x^3 - 8x^{\frac{1}{3}}\) has a minimum at the point \(A\).
  1. Find \(\frac{dy}{dx}\). [3]
  2. Find the \(x\)-coordinate of \(A\). [3]
The point \(B\) on the curve has \(x\)-coordinate 2.
  1. Find an equation for the tangent to the curve at \(B\) in the form \(y = mx + c\). [6]
OCR C1 Q1
3 marks Easy -1.2
  1. Calculate the discriminant of \(2x^2 + 8x + 8\). [2]
  2. State the number of real roots of the equation \(2x^2 + 8x + 8 = 0\). [1]
OCR C1 Q2
4 marks Moderate -0.3
Find the set of values of \(x\) for which $$(x - 1)(x - 2) < 20.$$ [4]
OCR C1 Q3
4 marks Easy -1.3
  1. Solve the equation $$x^{\frac{3}{2}} = 27.$$ [2]
  2. Express \((2\frac{1}{4})^{-\frac{3}{2}}\) as an exact fraction in its simplest form. [2]
OCR C1 Q4
5 marks Moderate -0.3
Differentiate with respect to \(x\) $$\frac{6x^2 - 1}{2\sqrt{x}}.$$ [5]
OCR C1 Q5
6 marks Moderate -0.8
\includegraphics{figure_5} The diagram shows a sketch of the curve with equation \(y = f(x)\). The curve has a maximum at \((-3, 4)\) and a minimum at \((1, -2)\). Showing the coordinates of any turning points, sketch on separate diagrams the curves with equations
  1. \(y = 2f(x)\), [3]
  2. \(y = -f(x)\). [3]
OCR C1 Q6
8 marks Moderate -0.8
\(f(x) = 2x^2 - 4x + 1\).
  1. Find the values of the constants \(a\), \(b\) and \(c\) such that $$f(x) = a(x + b)^2 + c.$$ [4]
  2. State the equation of the line of symmetry of the curve \(y = f(x)\). [1]
  3. Solve the equation \(f(x) = 3\), giving your answers in exact form. [3]
OCR C1 Q7
9 marks Moderate -0.3
A curve has the equation $$y = x^3 + ax^2 - 15x + b,$$ where \(a\) and \(b\) are constants. Given that the curve is stationary at the point \((-1, 12)\),
  1. find the values of \(a\) and \(b\), [6]
  2. find the coordinates of the other stationary point of the curve. [3]
OCR C1 Q8
10 marks Standard +0.3
The circle \(C\) has the equation $$x^2 + y^2 + 10x - 8y + k = 0,$$ where \(k\) is a constant. Given that the point with coordinates \((-6, 5)\) lies on \(C\),
  1. find the value of \(k\), [2]
  2. find the coordinates of the centre and the radius of \(C\). [3]
A straight line which passes through the point \(A(2, 3)\) is a tangent to \(C\) at the point \(B\).
  1. Find the length \(AB\) in the form \(k\sqrt{5}\). [5]
OCR C1 Q9
10 marks Standard +0.3
A curve has the equation \(y = x + \frac{3}{x}\), \(x \neq 0\). The point \(P\) on the curve has \(x\)-coordinate \(1\).
  1. Show that the gradient of the curve at \(P\) is \(-2\). [3]
  2. Find an equation for the normal to the curve at \(P\), giving your answer in the form \(y = mx + c\). [3]
  3. Find the coordinates of the point where the normal to the curve at \(P\) intersects the curve again. [4]
OCR C1 Q10
13 marks Moderate -0.3
The straight line \(l_1\) has equation \(2x + y - 14 = 0\) and crosses the \(x\)-axis at the point \(A\).
  1. Find the coordinates of \(A\). [2]
The straight line \(l_2\) is parallel to \(l_1\) and passes through the point \(B(-6, 6)\).
  1. Find an equation for \(l_2\) in the form \(y = mx + c\). [3]
The line \(l_2\) crosses the \(x\)-axis at the point \(C\).
  1. Find the coordinates of \(C\). [1]
The point \(D\) lies on \(l_1\) and is such that \(CD\) is perpendicular to \(l_1\).
  1. Show that \(D\) has coordinates \((5, 4)\). [5]
  2. Find the area of triangle \(ACD\). [2]
OCR C1 Q1
4 marks Moderate -0.5
Find the value of \(y\) such that $$4^{y+1} = 8^{2y-1}.$$ [4]
OCR C1 Q2
4 marks Easy -1.2
Express \(\sqrt{22.5}\) in the form \(k\sqrt{10}\). [4]
OCR C1 Q3
5 marks Moderate -0.8
A circle has the equation $$x^2 + y^2 + 8x - 4y + k = 0,$$ where \(k\) is a constant.
  1. Find the coordinates of the centre of the circle. [2]
Given that the \(x\)-axis is a tangent to the circle,
  1. Find the value of \(k\). [3]
OCR C1 Q4
6 marks Moderate -0.8
$$\text{f}(x) = 4x - 3x^2 - x^3.$$
  1. Fully factorise \(4x - 3x^2 - x^3\). [3]
  2. Sketch the curve \(y = \text{f}(x)\), showing the coordinates of any points of intersection with the coordinate axes. [3]
OCR C1 Q5
8 marks Moderate -0.3
  1. Find in exact form the coordinates of the points where the curve \(y = x^2 - 4x + 2\) crosses the \(x\)-axis. [4]
  2. Find the value of the constant \(k\) for which the straight line \(y = 2x + k\) is a tangent to the curve \(y = x^2 - 4x + 2\). [4]
OCR C1 Q6
10 marks Moderate -0.8
Some ink is poured onto a piece of cloth forming a stain that then spreads. The area of the stain, \(A\) cm\(^2\), after \(t\) seconds is given by $$A = (p + qt)^2,$$ where \(p\) and \(q\) are positive constants. Given that when \(t = 0\), \(A = 4\) and that when \(t = 5\), \(A = 9\),
  1. find the value of \(p\) and show that \(q = \frac{1}{5}\), [5]
  2. find \(\frac{\mathrm{d}A}{\mathrm{d}t}\) in terms of \(t\), [3]
  3. find the rate at which the area of the stain is increasing when \(t = 15\). [2]
OCR C1 Q7
11 marks Moderate -0.8
The curve \(C\) has the equation \(y = x^2 + 2x + 4\).
  1. Express \(x^2 + 2x + 4\) in the form \((x + p)^2 + q\) and hence state the coordinates of the minimum point of \(C\). [4]
The straight line \(l\) has the equation \(x + y = 8\).
  1. Sketch \(l\) and \(C\) on the same set of axes. [3]
  2. Find the coordinates of the points where \(l\) and \(C\) intersect. [4]
OCR C1 Q8
11 marks Moderate -0.3
$$\text{f}(x) \equiv \frac{(x-4)^2}{2x^{\frac{1}{2}}}, \quad x > 0.$$
  1. Find the values of the constants \(A\), \(B\) and \(C\) such that $$\text{f}(x) = Ax^{\frac{3}{2}} + Bx^{\frac{1}{2}} + Cx^{-\frac{1}{2}}.$$ [3]
  2. Show that $$\text{f}'(x) = \frac{3x^2 - 8x - 16}{4x^{\frac{3}{2}}}.$$ [5]
  3. Find the coordinates of the stationary point of the curve \(y = \text{f}(x)\). [3]