Question

if 3^(x-1) -3^ (x-3)=8 value of (x2-x+4) is ?
​

Answer 1

Step-by-step explanation:

Method:

3

x

−3

x−1

=18

⇒3

x

−

3

3

x

=18

⇒3

x

(

3

2

)=18

3

x−1

.2=3

2

.2

x−1=2

∴x=3

x

x

=3

3

=27.