Question

How do you find the domain of f(x)=x^2

Answer 1

we exclude the numbers from the domain of the function in 2 cases
1) the denominator = 0
2) the quantity under the square root sign is negative

do u see any of these conditions met here ?

Answer 2

no

Answer 3

right, so you won't exclude any number and the domain of x^2 would be all real numbers.

Answer 4

infact , for ANY polynomial, the domain is all reals numbers :)

Answer 5

oh okay thanks what about g(x)=1/x^2+2 ?

Answer 6

for what values of x is denominator = 0 ?

Answer 7

0 ?

Answer 8

is it (1/x^2) +2
or
1/(x^2+2)
??

Answer 9

the first one lol

Answer 10

then yes, 0 will be excluded from the domain

Answer 11

final domain, is all real numbers excluding 0

Answer 12

so when I look for domain of expressions it just houldn't have a denominator of 0 or a negative square root ?

Answer 13

right :)

Answer 14

okay thanks!!

Answer 15

oh wait i have one more question

Answer 16

welcome ^_^