the sum of first n terms of the series a,3a,5a,....is
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Answer:
the sum of n terms of the series is
Step-by-step explanation:
a+3a+5a+....................+Nth number term of the series
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Answer:
Step-by-step explanation:
First term =a, common difference=2a
Sum.to n terms of AP= n/2 * (2a+(n-1)*d)
= n/2 * (2a+(n-1)2a)
= n/2 * (2a+2an-2a)
= n/2 * (2an)
Sum to n terms =an²
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