Step 1:

The function is $\"\"$ .

The function is compared with general quadratic equation $\"\"$ .

Where $\"\"$ , $\"\"$ and $\"\"$ .

If the function has $\"\"$ , then function has minimum value at $\"\"$ .

The function has $\"\"$ .

Therefore the function has minimum value at $\"\"$ .

$\"\"$

The minimum value of function is $\"\"$ .

$\"\"$ .

$\"\"$

The minimum value of function is $\"\"$ .

Solution:

The minimum value of function is $\"\"$ .