In an AP 1,4,7...,atleast how many terms should be added so that the sum is a number of the same AP
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147=n/2(2a+(n-1)d
n/2*2+n-1*3
294=n(3n-n)
294=n^2-n
n/2*2+n-1*3
294=n(3n-n)
294=n^2-n
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The AP is 1,4,7... Then how many terms should be added so that the sum is also a term of the same AP.
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