$\"\"$

\

(a)

\

The functions are $\"\"$ and $\"\"$ .

\

Find $\"\"$ .

\

Observe the two graphs of functions $\"\"$ and $\"\"$ :

\

$\"\"$ and $\"\"$ .

\

$\"\"$ $\"\"$

\

$\"\"$

\

$\"\"$ .

\

The value of $\"\"$ .

\

$\"\"$

\

(b)

\

The functions are $\"\"$ and $\"\"$ .

\

Find $\"\"$ .

\

Observe the two graphs of functions $\"\"$ and $\"\"$ :

\

$\"\"$ and $\"\"$ .

\

$\"\"$ $\"\"$

\

$\"\"$

\

$\"\"$ .

\

The value of $\"\"$ .

\

$\"\"$

\

(a) The value of $\"\"$ .

\

(b) The value of $\"\"$ .