If A(1), A(2), A(3), A(4) are four A.M’s...

If `A_(1), A_(2), A_(3), A_(4)` are four A.M’s between`1/2` and 3, then prove `A_(1) + A_(2) + A_(3) + A_(4)` = 7.

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CBSE COMPLEMENTARY MATERIAL-SEQUENCES AND SERIES -SECTION-C(SHORT anwer type )

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