f(-3)=4^-3

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Solution for f(-3)=4^-3 equation: 



f(-3)=4^-3

We move all terms to the left:

f(-3)-(4^-3)=0

We add all the numbers together, and all the variables

f(-3)-0.015625=0

We multiply parentheses

-3f-0.015625=0

We move all terms containing f to the left, all other terms to the right

-3f=0.015625

f=0.015625/-3

f=-0.015625/3

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