Question

4 power x-1 = 2 power x+2 then x is

Answer 1

Answer:

−2

−2

x+1

=0

4

x−2

=2

x+1

2

2x−4

=2

x+1

2x−4=x+1

x=5

Answer 2

Answer:

x=3

Step-by-step explanation:

4^x-1 - 2^x+1= 0

4 is 2 power 2 so equation becomes two power 2 to whole power x-1. We transpose 2 power x+1 to other side.

So, we get

2^2x-2=2^x+1

Since base is same, value of exponent is same.

2x-2=x+1

→2x-x=1+2

→x=3