Question

If 5x^2 + y^4 = -9 then evaluate d^2y/dx^2 when x = 2 and y = 1

Answer 1

this \[5x^2 + y^4 = -9\]

is not possible

Answer 2

and definitely not true for x=2 and y=1

Answer 3

really?

Answer 4

x^2 is positive for all real values
similarly y^4 is positive
so sum can not be negative.

Answer 5

hmm okk so should I just say not possible?

Answer 6

yes

Answer 7

perhaps the person who made this up was not paying attention
that is \(-9\) on the right yes?

Answer 8

yes -9