How do you evaluate the expression for $2^x$ if $x=-2$ and if $x=3$ ?

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Answer 1 · 2017-01-06T13:17:34

For each of these you substitute the value for $x$ in the expression.

Problem 1: Solve for $x = −2$

$2^-2$

We can use this rule for exponents to rewrite this problem:

$x^color(red)(a) = 1/x^color(red)(-a)$

$2^color(red)(-2)$

$1/2^color(red)(- - 2)$

$1/2^color(red)(2)$

$1/4$

Problem 1: Solve for $x = 3$

$2^3$

$2 xx 2 xx 2$

$8$

How do you evaluate the expression for 2^x2^x if x=-2x=-2 and if x=3x=3?