exam Maths Puzzle Numerical Ability

Can someone please help me with this problem:
If g(x) is an inverse of f(x), then how do the x-values and y-values coordinates of the points on f(x) map onto coordinates of g(x)?

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exam Other Question

USING THE LOG PROPERTIES WRITE THE FOLLOWING AS A SINGLE LOG. EXPRESS ANY EXPONENTS AS EXPONENTS RATHER THAN FACTORS

LOG(X^5/X-5) + LOG(3(X-5)/X)-3LOGx
Solve: logbase2(1-x)+logbase2(4x+1)=0