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101 101 Suppose that Σ ai = -12 and Σ bi = -19. i=1 i=1 Compute the sum. 101 Σ( – 5ai – 12bi) i=1​

101 101 Suppose that Σ ai = -12 and Σ bi = -19. i=1 i=1 Compute the sum. 101 Σ( – 5ai-example-1
User DaBlick
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Distribute the summation over the sum.


\displaystyle \sum_(i=1)^(101) (-5a_i - 12b_i) = -5 \sum_(i=1)^(101) a_i - 12 \sum_(i=1)^(101) b_i

Now plug in the known sums and simplify.


\displaystyle \sum_(i=1)^(101) (-5a_i - 12b_i) = -5(-12) - 12(-19) = \boxed{288}

User Anayansi
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