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# How do you answer cube root 1/27 = 3-y (the negative y is a power on 3)?

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How do you answer cube root 1/27 = 3-y (the negative y is a power on 3)?

Sep 24, 2017

#1
+27476
+4

Like so

$$\frac{1}{27}=3^{-y}\\ \frac{1}{27}=\frac{1}{3^y}\\ 3^y=27\\y=3$$

.
Sep 24, 2017

#1
+27476
+4

Like so

$$\frac{1}{27}=3^{-y}\\ \frac{1}{27}=\frac{1}{3^y}\\ 3^y=27\\y=3$$

Alan Sep 24, 2017
#2
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O ma god Alan your'e a jeniuz thanks so much

Guest Sep 25, 2017