How to enter a function in the form a*log(1+bx/(cx+d)) in cvx

1

Hi everyone, I’m new to cvx, and I am trying to represent a function in the form a*log(1+bx/(cx+d)) in cvx. The function is concave in terms of x, and a,b,c, and d are all positive constants. Any input is appreciated.

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Divide b and d by c, and use my formulation at Can CVX solve this kind of function {x-log(1+0.01*x/(x+1))} - #15 by Mark_L_Stone