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Q.

If 100 times of the 100th terms of an A.P. with non-zero common difference equal to 50 times its 50th term, then 150th term of their A.P.  is ___

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a

150

b

0

c

15

d

-150

answer is B.

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Detailed Solution

100   t100=50     t50 ⇒100(9+99d)=50(a+49d) ⇒a+149d=0 ⇒t150=0

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