Question

Find the domain for each function please explain. f(x)=10x^2 + x f(x)= -2/x^2

Answer 1

The functions are and

The domain is the possible values of the in the function.

1. The doamin of the first function i.e is all real numbers, because the function is true for any value of in the set of the real numbers, there is no value of at which the function becomes false. Hence the doamin of the function is all rea numbers or R.
2. The domain of the second function i.e. ,

• we know that the denominatior can never be zero, hence the term in the denominaor of the function can never be zero, because a zero the function becomes false, therefore we can say that .
• for all the other values of the function true.
• therefore the domain of the function is all real number except zero, because at zero the function can not be defined.

ANSWER----------->>>> domain of first function is set all real numbers or R, and the domain of the second finction is set of all real numbers except 0 or R - {0}.