1) 64*2^x-^1=4^x 
2)9^x-5*3^x+6=0
3)Iog^x-^1(x^2-5x+7)=1

2^6*2^1/x=2^2x

6/x=2x

6=2x^2

x^2=3

x1=sqrt3

x2=-sqrt3

2) 3^2x-5*3^x+6=0

3^x=t

3^2x=t^2

t^2-5t+6

D=25-24=1 

t1=5+1/2=3

t2=5-1/2=2

3^x1=3 

x1=1

3^x=2

x2=na risunke

3)