If $x^3 + y^3 = 16 $ and $ x + y = 4,$ then the value of $ x^4 + y^4$ is :
Answer & explanation
Correct answer: option 1
If $x^3 + y^3 = 16 $
$ x + y = 4,$
then the value of $ x^4 + y^4$ = ?
Put the value of x = 2 ( This value will satisfy the equation )
$ x^4 + y^4$ = $ 2^4 + 2^4$ = 16 + 16 = 32