Arun
Last Activity: 7 Years ago
Dear Aayushi
f'(x) = (2^x -1) * 2 (2^x -2) * 2^x * ln2 + (2^x -2)² *2^x ln2
Now
Put f'(x) = 0
(2^x -2) [(2^(x+1) -2 + 2^x -2] = 0
2^x - 2 = 0
Hence x = 1
Also (2^(x+1) + 2^x -4) = 0
Now I hope, you can solve this.
In case of any difficulty please feel free to ask.
Regards
Arun (askIITiams forum expert)
