हिंदी

If f(x) = x|x|, then f'(x) = ______. - Mathematics

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प्रश्न

If f(x) = x|x|, then f'(x) = ______.

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उत्तर

If f(x) = x|x|, then f'(x) = 2|x|.

Explanation:

f(x) = x|x|

f(x) = `{:[(x^2",", x ≥ 0),(-x^2",", x < 0):}`

f'(x) = `{:[(2x",", x ≥ 0),(-2x",", x < 0):}`

Hence, f'(x) is differential everywhere f'(x) = 2|x|.

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