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If sum of first n term is 4n²-n then find its ten term

Posted by Bl Gurjar 6 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Kratika Nyati 6 years, 10 months ago

1Thank You

Ship.. ??? 6 years, 10 months ago

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

0Thank You

Rohan Kaushik 6 years, 10 months ago

I know answer

0Thank You

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CBSE > Class 10 > Mathematics