Domain of a multi variable function

akool

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Feb 18, 2020
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The function is f((x,y) = 1/((25-125^(5x-9y-55)) with the answer needing to be in the form ax+by+c. The only hint I have is as following: Convert to an exponential equation of the form a^(b)=a^(c), which implies b=c. Capture.PNG
 
Ar you sitting for this exam right now? Should ANYONE be helping you?

25 = 5^2
125 = 5^3
Where does that lead?
 
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