exam Maths Puzzle Numerical Ability

Maximize the objective function C = 3x + 2y with the constraints x + 2y <-4, x - y <- 1, x >- 0, y>- 0.

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exam Other Question

f(x) = (1 + x)/x
g(x) = 1/(1 - x)
h(x) = 1/(1 + x)
If so, (g o h)(x) =

a. x
b. 2 - x
c. -x
d. x/(2x + 1)
e. (1 - x)/(2 - x)
f. (1 + x)/x
g. (2 - x)/(1 - x) 2x^2+x-1/x+1 times 5+x/10x-5 drawing a blank on this one..please advise