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  • Find the sum of following series, 0.9,0.91,0.92,.......100 terms

Find the sum of following series, 0.9,0.91,0.92,.......100 terms

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The given series is an ap with common difference 0.01

\\S_n=\frac{n}{2}(2a+(n-1)d)\\\\n=100\\S_{100}=\frac{100}{2}(2\times0.9+(100-1)\times0.01)\\\\=50(1.8+0.99)=139.5

 

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Safeer PP

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