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Question

Question 10
What is the common difference of an AP in which
a18a14=32 ?


A) 8
B) -8
C) -4
D) 4

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Solution

Given, a18a14=32
a+(181)d[a+(141)d]=32 [an=a+(n1)d]
a+17da13d=32
4d=32
d=8
Hence, the common difference of the A.P is 8.

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