2 Answers

Smudge · Answer 1 · 2020-04-19T03:52:06+0000

ANSWER

(1)/(2)

EXPLANATION

The given expression is;

$2 {x}^( - 4) y$

We want to find the value of this expression when x=2 and y=4.

We substitute to get,

$2 {(2)}^( - 4) (4)$

$8 * {2}^( - 4)$

Recall that

${a}^( - m) = \frac{1}{ {a}^(m) }$

This implies that,

$8 * {2}^( - 4) = 8 * \frac{1}{ {2}^(4) }$

$8 * {2}^( - 4) = 8 * (1)/(16 ) = (1)/(2)$

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