Question

How do solve `3/(x+1)<=3` graphically?

Answer 1

The solution is `x in (-oo, -1) uu[0, +oo)`

Explanation:

Plot the curve

`f(x)=3/(x+1)-3`

The function is undefined for `x=-1`

graph{3/(x+1)-3 [-18.02, 18.03, -9.01, 9.01]}

Then, look where `f(x)<=0`

The solution is `x in (-oo, -1) uu[0, +oo)`