Algebraic Expressions

Given $y = 2^x$

a.

Express $4^x\,$ in terms of $y$ .

[2]

b.

Hence, or otherwise, given that $x = 3$ is a solution of

4^x - k(2^x) - 16 = 0

where $k\,$ is a constant, find the value of $k$ .

[3]

Given $y = 2^x$

a.

Express $4^x\,$ in terms of $y$ .

[2]

b.

Hence, or otherwise, given that $x = 3$ is a solution of

4^x - k(2^x) - 16 = 0

where $k\,$ is a constant, find the value of $k$ .

[3]

Algebraic Expressions Questions