If Sn denotes the sum of the first n terms of an A.P, prove that S30=3(S20-S10)
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S30=3(S20-S10)
S30=3*S10
S30=S30
varunking28:
actually this question is of A.P
and it constitutes of 4 Marks
you answered it for, as if it was of one marks question
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