Find the sum of first 20 terms of arithmetic series 5 + 10 + 15 + ..... #shorts #sslcexam

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Find the sum of first 20 terms of arithmetic series 5 + 10 + 15 + ..... using suitable formula.
The question is taken from SSLC Karnataka Mathematics September 2020 question paper
and is solved through animated video
2 mark question
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Find the first 20 positive integers using Sn formula? Please solve

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