# Chapter 1 - Section 1.2 - Operations with Real Numbers and Simplifying Algebraic Expressions - Exercise Set - Page 27: 65

$1$

#### Work Step by Step

Having an exponent of 4 means that the base (which is -1) will be multiplied by itself four times. Thus, we obtain: $(-1)^4 \\=(-1)(-1)(-1)(-1) \\=1(-1)(-1) \\=-1(-1) \\=1$

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