Let a_1, a_2, a_3, , a_ 49 be in A.P. such that _ k=0 ^ 12 a_ 4k+1 = 416 and a_9 + a_ 43 = 66. If a_1^2 +...

Question

Let a_1, a_2, a_3, , a_ 49 be in A.P. such that _ k=0 ^ 12 a_ 4k+1 = 416 and a_9 + a_ 43 = 66. If a_1^2 + a_2^2 + + a_ 17 ^2 = 140m, then m is equal to :

Accepted Answer

(C)

JEE Main 2018 Mathematics question

Solution