NCERT Class XI Mathematics - Limits and Derivatives - Solutions

Question : 33

Total: 72

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

Solution:

Let f(x) = x2 – 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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