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9^x=27
3^²x=3³
2x=3 //: 2
x=3/2
d)
1/4=8^x
2^³x=2^-²
3x=-2 //:3
x=-2/3
e)
√2^x=1/32
2^1/2x=1/2^6
1/2x=-6 //*2
x=-12
i)
2^x*√2=1/16
2^x*2^1/2=2^-4
2^x=2^-4 / 2^1/2
2^x=2^(-4-0,5)
2^x=2^(-4,5)
x= -4,5
j)
1/49*7^x=√7
7^-²*7^x=7^(1/2)
7^(-2)*7^x=7^(0,5) // : 7^-2
7^x=7^(0,5) /7^(-²)
x=7^(0,5-(-2)
x=7^(0,5+2)
x=2,5