Maximum value of x3y3 + 3 x*y when x+y = 8.

The answer is 4144.

Step-by-step explanation:

We have to find the maximum value of f(x)= when

We can write as

Substituting the value of y

=

=

For maximum, we will equate the equation to 0.

And we get,

=> x = 4

And as

> y = 4

So, we will put these values in equation to get maximum value.

=

=

=

= = 4144

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.