# Chapter 11 - Section 11.3 - Series - Exercise Set: 55

$45$

#### Work Step by Step

Plug in and use PEMDAS (parentheses, exponentiation, multiplication, division, addition, subtraction) to determine which operation goes first. $\frac{3(1-2^4)}{1-2} = \frac{3(1-16)}{1-2} = \frac{3(-15)}{-1} = \frac{-45}{-1} = 45$

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