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The left hand derivative of f(x) = [x] sin (pi x) at x = k, k is an integer, is

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The left hand derivative of f(x) = [x] sin (pi x) at x = k, k is an integer, is

(a) (-1)k (k - 1)pi

(b) (-1)k-1 - (k - 1) pi

(c) (-1)k k pi

(d) (-1)k -1 k pi

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1 Answer

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Best answer

Correct option (a) (-1)k (k - 1)pi

Explanation :

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