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  • What is the sum of the first 17 terms of an AP if the first term is -20 and the last term is 28

What is the sum of the first 17 terms of an AP if the first term is -20 and the last term is 28

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\\sum=\frac{n}{2}(first \ term+last \ term)\\\\sum=\frac{17}{2}(-20+28)=68

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Safeer PP

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