Find the derivative of x² – 2 at x = 10.

NCERT Class XI Mathematics - Limits and Derivatives - Solutions

Question : 33 of 72

Marks: +1, -0

Find the derivative of

x^2

– 2 at x = 10.

Solution:

Let f(x) =

x^2

– 2 ... (i)

Differentiating (i) with respect to x, we get

f ′(x) = 2x

At x = 10, f ′(10) = 2(10) = 20.

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