aaliyahrice02
05.12.2019 •
Mathematics
(50 points) determine whether x^-2 is always, sometimes or never a positive value. explain your reasoning. (for any value of x).
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Ответ:
never because you're multiplying the number -2 times so it will be positive only if the variable is positive.
Step-by-step explanation:
what if x=2?
2^-2
= 1 /2*2
= 1 /2^2
= 1 /4 or 0.25
what if x=-5?
-5^-2
=−1*5−2
=−1* 1 /5*5
= −1 /5*5
= −1 /5^2
= −1 /25 or-0.04
n
Ответ: