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If a1, a2, a3, ,a(2n+1) are in A.P., th...

If `a_1, a_2, a_3, ,a_(2n+1)` are in A.P., then `(a_(2n+1)-a_1)/(a_(2n+1)+a_1)+(a_(2n)-a_2)/(a_(2n)+a_2)++(a_(n+2)-a_n)/(a_(n+2)+a_n)` is equal to a. `(n(n+1))/2xx(a_2-a_1)/(a_(n+1))` b. `(n(n+1))/2` c. `(n+1)(a_2-a_1)` d. none of these

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