The left-hand derivative of f(x) = [x] sin (πx) at x = kWhere k is an – McqOptions

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1.	The left-hand derivative of f(x) = [x] sin (πx) at x = kWhere k is an integer and [x] is the greatest integer function, is
A.	(-1)k (k - 1)π
B.	(-1)k-1 (k - 1)π
C.	(-1)k kπ
D.	(-1)k-1 kπ
Answer» B. (-1)k-1 (k - 1)π

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