Application of DerivativeHard

Question

Consider an A.P. with first term ′a′ and the common difference d. Let Sk denote the sum of the first K terms. Let is independent of x, then -

Options

A.a = d/2
B.a = d
C.a = 2d
D.none of these

Solution



Now is independent of x if 2a - d = 0
⇒ a = d/2

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