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If sum of first n term is 4n²-n then find its ten term |
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Answer» 75 S1=4(1)^2-1=3 s1=S2= put n=2 now:s2-s1=a2 Similarly a3=s3-s2. We have A find d and find a10 or u can just simply do a10=s10-s9 I know answer |
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