Q. 10 A5.0( 3 Votes )

If a, b, c are in A.P., prove that:

(a — c)2 = 4 (a — b)(b — c)

Answer :

Given: a, b, c are in AP

a + c = 2b


Now taking RHS i.e. 4(a – b)(b – c)


(a – c)2


Hence Proved

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