Differentiate .
Answer and explanation
Correct answer: B.
- Step 1: Product rule with , : , . Step 2. . Step 3. Factorise: . **Answer: . Why not the others:** ignores the derivative of the exponential; ignores the derivative of ; the option mis-factorises as .
Practise more Differentiation and integration.
Free questions with an explanation for every one, and full timed A-Level UK (AQA, Edexcel, OCR) mock tests.