Question

help.? medal & fan.


State any restrictions on the variables.

4-x/x^2-16

x ≠ –4 and x ≠ 4
x ≠ –4
x ≠ 4
no restrictions are needed

Answer 1

first one. Which is:
\[x \neq -4\]
and
\[x \neq 4\]

Because they make 0 this statement:
\[\frac{ x }{ x^2 - 16 }\]

Answer 2

thanks , it makes alot more sense now