1)log(2)log(3)log(4)x=0;x>0
log(3)log(4)x=2^0
log(4)x=3
x=4³
x=64
2)log(4)log(3)log(2)x=0;x>0
log(3)log(2)x=4^0=1
log(2)x=3
x=2³
x=8
3)log(3)log(2)log(4)x=0;x>0
log(2)log(4)x=3^0=1
log(4)x=2
x=4²
x=16
4)log(2)log(4)log(3)x=0;x>0
log(4)log(3)x=2^0=1
log(3)x=4
x=3⁴
x=81