Use the formula for the sum of a geometric sequence to write the following sum in closed form. 83 +84 +85+. +8k, where k is any integer with k 2 3.

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A: I have given the answer in the next step. Hope you understand that

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Q: 14. 3w+ 2xy + 2z = -12 4w x + y + 2z = w+ x + y + z = -2w + 3x + 2y - 3x = 1 - 2 10

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Q: Solve the following system by any method 41₁-12 + 513 +3/4 = 21 1₁ - 313 +514 = 1 21₁ 212 +13 + 31₁…

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Q: If 24 kids ordered 9 pizzas, how would you cut the pizzas so each kid had a piece?

A: The details are given in step 2 nicely typeset in latex.