Which term of
a.P. 13, 25, 37, 49, will be 372 more than its 26th term?
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Answer:
26 term of this ap=
13+(26-1)12=13+25*12=13+300=313
a/q,313+372=685
13+(n-1)12=685
(n-1)12=672
(n-1)=56
n=57
required term is 57
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