How many term of the ap 27,24,........should we taken so that their sum is zero
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Explanation:
0=n/2[2a+(n-1)d]
0=n[2*27+(n-1) -3]
0=n [54+(n-1)-3]
0=n[54-3n+3]
0=54n-3n²+3n
3n²-54n-3n=0
3n²-57n=0
solve this equation then we get the n value.
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