how many terms of the A.P 18, 16, be taken so that their sum is zero
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sorry the above answer is wrong. the correct one is below
Sn=n/2(2a+(n-1)d)
0=2*18+(n-1)(-2)
0=36-2n+2
0=38-2n
2n=38
n=19
sorry the above answer is wrong. the correct one is below
Sn=n/2(2a+(n-1)d)
0=2*18+(n-1)(-2)
0=36-2n+2
0=38-2n
2n=38
n=19
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bishista:
Umm.... You are wrong my dear. It is the sum not the term.
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