QuestionFind $(x+y)^{-1 / 2}$ if $x=11$ and $y=25$. Choices: a) 6 b) -6 c) $\frac{\sqrt{11}}{55}$ d) $\frac{1}{6}$ e) $-\frac{1}{6}$

Studdy Solution
Now, substitute the square root of36 into the expression.
$$\frac{1}{\sqrt{36}} = \frac{1}{6}$$So, the value of $(x+y)^{-1 /2}$ is $\frac{1}{6}$, which corresponds to option d.