1) log5 100-log5 4 2)log6 x=-2 3)3^x=1/27 4)3cos60+2sin30-sin90

Question

1) log5 100-log5 4
2)log6 x=-2
3)3^x=1/27
4)3cos60+2sin30-sin90

Answer 1

1) log5 100 - log5 4 = log5 100/4 = log5 25= 2
2)log6 х = -2 ; х = 6^-2= 1/36
3) 3^х=1/27 ; х=-3