Question

40. If x and y are both positive, then the minimum value of (x + y) ((1/x) + (1/y))
is : *
O O
O 1
O 2
O 4​

Answer 1

Answer:

4 ha plzzz like and follow meeee

Answer 2

Answer:

4

Explanation:

:

By symmetry

x

=

y

=

λ

so substituting

(

2

λ

)

(

2

λ

)

=

4

Now supposing

x

=

λ

−

δ

and

y

=

λ

+

δ

we have

(

2

λ

)

(

1

λ

−

δ

+

1

λ

+

δ

)

=

4

λ

2

λ

2

−

δ

2

As we can observe the minimum value for

f

(

λ

)

=

4

λ

2

λ

2

−

δ

2

is

4

for

δ

=

0