Question

FIND THE MAXIMUM AND MINIMUM VALUE OF 2X-7-5X^2

Answer 1

Answer:

.......................

Answer 2

Answer:

⇒−[(

5

x)

2

+2(

5

x)×(

5

1

)+(

5

1

)

2

]−(

5

1

)

2

+7

⇒−(

5

x+

5

1

)

2

+

5

1

−7

⇒

5

34

−(

5

x+

5

1

)

2

As (

5

x+

5

1

)

2

≥0

∴ max. value e at

5a

+

5

1

=0⇒

a=

5

1