Question

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Answer 1

Don't write functions like this :f(x) = thirteen divided by quantity ten minus x. \[\Large f(x) =\frac{ 13 }{ 10-x }\]rational functions like this are defined wherever the denominator is NOT equal to zero.

When is the denominator, 10-x, equal to zero? set it equal to zero and solve if necessary: 10-x = 0

Answer 2

i'm still confused @agent0smith

Answer 3

By what?

You can't divide by zero, right? So the denominator can not equal to zero.

\[\large 10-x \ne 0\]

Answer 4

i got that! But, how do i get the answer?

Answer 5

Solve for x. I assume you know how to solve 10-x = 0 ...?

Answer 6

10 minus what number, will equal zero?

Answer 7

Oh, i feel dumb now. Thank you!

Answer 8

lol, don't :D