If a_1, a_2, a_3, , a_ 2n+1 are in AP then a_ 2n+1 - a_1 a_ 2n+1 + a_1 + a_ 2n - a_2 a_ 2n + a_2 + + a_ n+2 -...

Question

If a_1, a_2, a_3, , a_ 2n+1 are in AP 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

Accepted Answer

(A)

JEE Advanced Mathematics question