help...

5^((x+1)/(1-2x)) < 0.2^-3

5^((x+1)/(1-2x))<125. Cannot be reduced further, I think.

5^{(x + 1) / (1 - 2x)}  <  0.3^-3

5^{(x + 1) / (1 - 2x)}  <  125

5^{(x + 1) / (1 - 2x)}  <  5³

(x + 1) / (1 - 2x)  < 3

(x + 1)   <   3(1 - 2x)

x + 1   <   3 - 6x

7x   <   2

x   <   2/7

forgot to say i need to get xE(-infinity,2/7)U(1/2,+infinity)