If 2⁴×4² = 16x, then find the value of x.

5

For any positive real number x, write the value of

9

If (x-1)³ = 8, what is the value of (x+1)²

11

If 3^x-1=9 and 4^y+2 = 64, What is the value of .

12

Write the value of .