OCR C1 — Question 4 6 marks

Exam BoardOCR
ModuleC1 (Core Mathematics 1)
Marks6
PaperDownload PDF ↗
Mark schemeDownload PDF ↗
TopicCurve Sketching
TypeRational curve intersections
DifficultyStandard +0.3 This C1 question requires sketching a standard parabola and a reciprocal function, then using the sketch to count intersections. While it involves two curves and connecting graphical reasoning to equation solving, the individual sketches are routine and the intersection counting is straightforward visual analysis—slightly above average due to the multi-step nature but well within standard C1 expectations.
Spec1.02n Sketch curves: simple equations including polynomials1.02o Sketch reciprocal curves: y=a/x and y=a/x^21.02q Use intersection points: of graphs to solve equations

4. (i) Sketch on the same diagram the curves \(y = x ^ { 2 } - 4 x\) and \(y = - \frac { 1 } { x }\).
(ii) State, with a reason, the number of real solutions to the equation $$x ^ { 2 } - 4 x + \frac { 1 } { x } = 0 .$$

4. (i) Sketch on the same diagram the curves $y = x ^ { 2 } - 4 x$ and $y = - \frac { 1 } { x }$.\\
(ii) State, with a reason, the number of real solutions to the equation

$$x ^ { 2 } - 4 x + \frac { 1 } { x } = 0 .$$

\hfill \mbox{\textit{OCR C1  Q4 [6]}}