Question

if 9^x-10.3^x+9=0 then x is equal to ​

Answer 1

Answer:

x=0,2

Step-by-step explanation:

3^2x - 10.3^x + 9= 0  

take, 3^x = y

.'.y^2- 10y +9=0

or, (y-1)(y-9)=0  

y=1,9  

.'. x=0,2 ('.'3^0=1 and 3^2=9)