ln5^x+ln3^2x=92

xln5+2xln3=92
x(ln5+2ln3)=92
xln[5*(3^2)]=92
xln45=92
解得x=92/ln45

ln5^x+ln3^2x=92
xln5+xln9=92
x(ln5+ln9)=92
xln45=92
x=92/ln45.???

xln5+2xln3=92
x=92/(ln5+2ln3)

xln5+2xln3=92
x(ln5+2ln3)=92
xln[5*(3^2)]=92
xln45=92
x=92/ln45

ln5^x+ln3^2x=92
利用指数性质
得xln5+2xln3=92
得x=92/(ln5+2ln3)

log45(e^92)杩囩▼:ln[(5^X)脳(3^2X)]=92;ln(45^X)=92;X=log45(e^92)