Question

решите логарифмическое неравенство:log 1/9^x+log(3)^9x<3

Answer 1

log(3)x/(log(3)1/9)+log(3)9+log(3)x<3
-1/2*log(3)x+2+log(3)x<3
1/2*log(3)x<1
log(3)x<2x<9
x∈(0;9)