Question

Find the derivative of the following function at x = 12. f(x) = 7x2

Answer 1

$\text{Given that,}\\\\f(x) = 7x^2\\\\f'(x) = 7\cdot 2 x = 14x\\\\\text{At x = 12,}\\\\f'(12) = 14 \times 12 = 168$