Use the summation properties and rules to evaluate each series. n(n+1) Summation Rules: Σ=1 1 = n; Σ ²₁ i = 2 20 Find the sum: Σ²0₁ (4i² − 7i + 9) n ; Σi=1 i² = n(n+1)(2n+1) 6

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