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Ainat [17]
3 years ago
10

For what value of y does 125=(1/25)^y-1

Mathematics
2 answers:
deff fn [24]3 years ago
6 0

Answer:

D. -1/2

Step-by-step explanation:

Alex777 [14]3 years ago
4 0

Answer:y=-1/2

Step-by-step explanation:

125=(1/25)^(y-1)

5^3=(5^(-2))^(y-1)

5^3=5^(-2(y-1))

The same base eliminate each other we then have

3=-2(y-1)

3=-2y+2

Collect like terms

2y=2-3

2y=-1

Divide both sides by 2

2y/2=-1/2

y=-1/2

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