Question

решите неравенство (1/27)^2-x>9^2x-1

Answer 1

2/27-х>18х-1; -х-18х>-1-2/27; -19х>(27^-1-2)/27; -19х>-(29/27); х<-(29/27)^-19; х<(29/27)^(1/19);
х<29/(27^19);
х<29/513