Question

h(x)=x-1
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x^3-9x find the domain and function

Answer 1

the domain will not be all real numbers because there are values of x which will make the denominator = 0 which makes the value of the function indeterminate.
You can find these values by solving x^3 - 9x = 0

Answer 2

the domain will be all Real numbers except the 2 zeroes of the above equation.

Answer 3

can you solve this equation?

Answer 4

i was doing my test review the answer they gaive is (-inf,-3)U(-3,0)U(0,3)U(3,INF)

Answer 5

yes thats the result in interval form

x^3 - 9x = 0
x(x^2 - 9) = 0
x = 0 , 3 , -3

- there are 3 values not 2 ( i missed out the -3)

Answer 6

NOW I SEE HOW THE ANSWER IS MADE

Answer 7

so we start with minus infinity up to -3 - all these are in the domain except -3

Answer 8

then thers the numbers between -3 and 0 included but not 0 - then numbers between 0 and 3 but not 0 and 3 , finally you have all numbers abobe ove 3 to infinity. The U means ;union'.

Answer 9

THANKS I ALSO WILL POST ANOTHER QUESTION I WISH TO KNOW HOW TO GET THE ANSWER

Answer 10

ok

Answer 11

the parentheses ( and ) mean 'between but not including the first and last numbers'