1.

Let a_1,a_2,... a_49 be in A.P. Such that sum_(k=0)^12a_(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

Answer»

68
34
66
33

Answer :B


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