Question

Solve the inequality (24x+4)^-1<0

Answer 1

I think you meant (24x+4)^(-1)<0.

This is equivalent to 1 / [4(6x+1)] < 0.

We must determine the set of values of x for which 6x+1 is not equal to zero and 6x+1 is less than 0 (because 1 / [4(6x+1)] < 0 for such values).

Solve 6x+1 < 0. 6x+1<0 becomes 6x < -1, or x < -1/6

This divides the number line into two halves: (- infinity, -1/6) and (-1/6, infinity).

From each half, choose an x value not equal to -1/6. If the original inequality is then true, you have found the interval that solves it. If false, choose the other interval to represent your solution.

Answer 2

x<-1/6

(24x+4)^-1<0
1/(24x+4)<0
1/(4(6x+1))<0 - denominator needs to be less than 0
4(6x+1)<0
6x+1<0
6x<-1
x<-1/6