exam Maths Puzzle Numerical Ability

x+4x < 3(1+x)

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exam Other Question

Hi, I'm having trouble with inverse functions. Can you help me?

Find the inverse function of f.

f(x) = x-2/x+2 determine rather the lines through each pair of point are parallel (2,-2) and (-8,10) (-7,-1) and (-2,5)