1 Simplify \(\left( \frac { 27 } { x ^ { 9 } } \right) ^ { \frac { 2 } { 3 } } \times \left( \frac { x ^ { 4 } } { 9 } \right)\).
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Question 1:
Answer Marks
Guidance
Answer/Working Marks
Guidance
\(x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\) M1
Method for solving quadratic
\(x = 3\) A1
cao
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Mark Scheme H640/01 November 2020
Question 1:
Answer Marks
Guidance
Answer Marks
Guidance
\(\left(\frac{27}{x^9}\right)^{\frac{2}{3}} \times \left(\frac{x^4}{9}\right) = \left(\frac{9}{x^6}\right) \times \left(\frac{x^4}{9}\right) = \frac{1}{x^2}\) M1, A1 [2]
M1: \(\frac{1}{x^6}\) soi. A1: Fully simplified. Allow \(x^{-2}\) oe
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**Question 1:**
| Answer/Working | Marks | Guidance |
|---|---|---|
| $x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$ | M1 | Method for solving quadratic |
| $x = 3$ | A1 | cao |
Please share the remaining pages and I'll extract accordingly.
# Mark Scheme H640/01 November 2020
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## Question 1:
| Answer | Marks | Guidance |
|--------|-------|----------|
| $\left(\frac{27}{x^9}\right)^{\frac{2}{3}} \times \left(\frac{x^4}{9}\right) = \left(\frac{9}{x^6}\right) \times \left(\frac{x^4}{9}\right) = \frac{1}{x^2}$ | M1, A1 [2] | M1: $\frac{1}{x^6}$ soi. A1: Fully simplified. Allow $x^{-2}$ oe |
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1 Simplify $\left( \frac { 27 } { x ^ { 9 } } \right) ^ { \frac { 2 } { 3 } } \times \left( \frac { x ^ { 4 } } { 9 } \right)$.\\[0pt]
[2]
\hfill \mbox{\textit{OCR MEI Paper 1 2020 Q1 [2]}}