Question

1.Find the absolute maximum value and the absolute minimum value of
sw
– 3 x² + 5 x + 8 in [0, 4].
​

Answer 1

Given Equation :-

3x² + 5x + 8

To find :-

The value of the equation , when the value of x is 4 and also is 0.

Salutation :-

f ( x ) = 3x² + 5x + 8

f ( 4 ) = 3 × ( 4 )² + 5 × 4 + 8

= 3 × 16 + 20 + 8

= 48 + 20 + 8

= 68 + 8

= 76 [ • Required Answer ( I ) ]

And ,

f ( 0 ) = 3 × ( 0 )² + 5 × 0 + 8

= 3 × 0 + 0 + 8

= 0 + 0 + 8

= 8 [ • Required Answer ( II ) ]