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Let a1, a2, ,a(10) be in A.P. and h1, h...

Let `a_1, a_2, ,a_(10)` be in A.P. and `h_1, h_2, h_(10)` be in H.P. If `a_1=h_1=2a n da_(10)=h_(10)=3,t h e na_4h_7` is `2` b. `3` c. `5` d. `6`

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