Question

define y as a function of f
8x^2+7y^2-1

Answer 1

You're typically given a function
f(x) = 2x*3+5 (example) right?
now thats the same that saying

y=2x*3+5

now your asked to form a function f(y), so...

Answer 2

so, I do y=x^2+7y^2-1

Answer 3

that would be
f(x,y)=x^2+7y^2-1

u have to go

8x^2+7y^2-1=0

8x^2=1- 7y^2

x^2=(1-7y^2)/8

x=sqrt((1-7y^2)/8)

f(y)=sqrt((1-7y^2)/8)

I think that's what ur asked to do :D

Answer 4

thank you...

Answer 5

ur welcome