How do you find $p(-2)$ if $p( n ) = 2^ { n }$ ?

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Answer 1 · 2017-09-02T20:52:21

$p(-2)=1/4$

We need to put -2 in for n to figure out what $p(-2)$ is:

$p(-2)=2^(-2)$

When you raise a number to a negative exponent, you flip the number into its reciprocal and make the exponent positive.

$p(-2)=2^(-2)=1/2^2=1/4$

How do you find p(-2)p(-2) if p( n ) = 2^ { n }p( n ) = 2^ { n }?