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What is 8 Σ (3n-1) equal to? n=1
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What is
8
Σ (3n-1) equal to?
n=1

What is 8 Σ (3n-1) equal to? n=1-example-1
User Jamadri
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\displaystyle\sum_(n=1)^(8) (3n-1)\implies \sum_(n=1)^(8)3n~~ - ~~\sum_(n=1)^(8)1\implies 3\sum_(n=1)^(8)n~~ - ~~\sum_(n=1)^(8)1 \\\\\\ 3\left( \cfrac{8(8+1)}{2} \right)~~ - ~~(8)(1)\implies 3(36)-8\implies 108-8\implies \text{\LARGE 100}

User Mattijn
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