value of parameter a (1 Viewer)

[juantheron]

 

[Paradoxica]

By inspection, the solution interval is 1 ≤ a ≤ 2.

 

[He-Mann]

 

[braintic]

This solution is incomplete. The fact that 2^x has a real value does not mean x is real.
After taking this into consideration, the answer is:
-2 < x ≤ 2

 

[Paradoxica]

This solution is incomplete. The fact that 2^x has a real value does not mean x is real.
After taking this into consideration, the answer is:
-2 < x ≤ 2

x is not the desired parameter.

 

[braintic]

-2 < a ≤ 2

But you knew that was just a typo.