Question

find the domain of the function f(x)=square root of (1+x) over (1-3x)

Answer 1

numerator gives us x>=-1 and denominator gives us x>1/3 so taking the intercestion we get x>1/3

Answer 2

im lost a little. do i just pick a number for x?

Answer 3

x>1/3

Answer 4

nope u just don't pick a number, u actually find the possible values for x and then take an intersection ...

Answer 5

ok i see thanks

Answer 6

d'u actually get it ?

Answer 7

\[f(x)={\sqrt{(1+x)} \over (1-3x)}\]
this equations domain?

Answer 8

yea

Answer 9

oh!!! then x != 1/3 is the answer

Answer 10

see i gave my ansewr based on this equation sqrt((1+x)/(1-3x))

Answer 11

the sqrt function needs to stay positive; and the bottom x cant make it go to 0

Answer 12

good notation helps ;)

Answer 13

D: = [-1,1/3) U (1/3 , inf)

Answer 14

k its in union intervals. thank you so much

Answer 15

<........[-1..............(1/3)...............>)

Answer 16

yup :)

Answer 17

yea

Answer 18

ok i see thanks

Answer 19

im lost a little. do i just pick a number for x?