Question

+20 Решите неравенство $log frac{1}{3}logx_{4} ( x^{2} -5) geq 0$ при х<= -3

Answer 1

1/3<1⇒
log(4)(x²-5)≤1
x²-5≤4
x²-9≤0
(x-3)(x+3)≤0
x=3  x=-3
-3≤x≤3 U x≤-3⇒x=-3