Find the -coordinates of the stationary points of .
Answer and explanation
Correct answer: A.
- Step 1: . Step 2. Set it to zero: or . **Answer: . Why not the others:** : The signs of both values are reversed. : That includes , which only appears if the constant of the derivative is zero. : That gives the sum and product of the roots, not the roots.
Practise more Limits, differentiation and integration.
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