Question

I will mark brainliest on solving this.

x+y=4 and 1/x+1/y=4 then the value of x³+y³=??

Pls solve step-by-step

Answer 1

x+y=4
1/x+1/y=4
x+y/xy=4
4/xy=4
xy=1
x^3+y^3=(x+y)^3 - 3xy(x+y)
=4^3 - 3(1)(4)
=12-12
=0

Answer 2

Answer:

Step-by-step explanation:

Plz i have don hard work plz mark me brainliest it would be mine 1 st brainliest answer

x+y=4

1/x+1/y=4

x+y/xy=4

4/xy=4

xy=1

x^3+y^3=(x+y)^3 - 3xy(x+y)

=4^3 - 3(1)(4)

=12-12

=0

Hope this will help you