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Question

If sum of n, 2n, 3n terms of an A.P. are S1,S2,S3 respectively, then the value of S3S2S1 is


A

3

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B

4

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C

6

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D

5

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Solution

The correct option is A

3


S1=n2[2a+(n1)d]S2=2n2[2a+(2n1)d]S3=3n2[2a+(3n1)d]S2S1=n2[2a+(3n1)d]3(S2S1)=S3S3S2S2=3


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