Q.
Let S1 be the sum of the first n terms of the A.P. 8,12,16………… and let S2 be the sum of the first n terms of the A.P 17,19,21…………, assume n≠0, then S1=S2 for:
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a
no value of n
b
one value of n
c
two values of n
d
more than 2 values of n
answer is B.
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Detailed Solution
n2[2.8+(n−1)4]=n2[2.17+(n−1)2]n[8+2(n−1)]=n(17+n−1)2n2+6n=n2+16nn2−10n=0n=0 (impossible) n=10
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