If \(f\left( x \right) =\begin{cases} { x }^{ 2 }-4x\quad ifx\ge 2 \\ x+2\quad ifx<2 \end{cases}\), then f(5) is _______.

(a)

-1

(b)

2

(c)

5

(d)

7

If f(x) = \(\frac{1-x}{1+x}\) then f(-x) is equal to _______.

(a)

-f(x)

(b)

\(\frac{1}{f(x)}\)

(c)

\(-\frac{1}{f(x)}\)

(d)

f(x)

The graph of y = 2x² is passing through _______.

(a)

(0,0)

(b)

(2,1)

(c)

(2,0)

(d)

(0,2)

The minimum value of the function f(x) = |x| is _______.

(a)

0

(b)

-1

(c)

+1

(d)

\(-\infty \)

If f(x) = 2^x and get g(x) = \(\frac{1}{2^x}\) then (fg)(x) is ________.

(a)

1

(b)

0

(c)

4^x

(d)

\(\frac{1}{4^x}\)