Question

Find the domain of the rational function
f(y)=y+7/y^2-7y

Answer 1

can u rewrite it with exactly form?

Answer 2

\[f(y)=\frac{ y+7 }{ y^2-7y}\]

Answer 3

y^2-7y#0 => y#0 and (y-7) #0
so y#0 and y#7
D=R\{0,7}