how do you find the domain and range...?

Question

f(x)={x+2, 1<_x<3
{3x-x^2+5, 3<_x<_7

how do you find the domain and range of this function??

<_ this means less than or equal to

Answer 1

The proper way to write "less than or equal to" is
<=
"greater than or equal to" is
>=

The domain of a function is all the inputs you can give it (x inputs, in this case) that yield a meaningful result. If you can think of any values of x that don't yield a real answer, those values are not in the domain.

The range of a function is all the outputs generated by the function. In this case, the range is all the values that f(x) can have.