How to Find the Domain of a Fraction Function Using Interval Notation: f(x) = 9/(x - 6)

For the following exercises, find the domain of each function using interval notation.
f(x) = 9/(x - 6)
f(x) = (3x + 1)/(4x + 2)
f(x) = sqrt(x + 4)/(x - 4)

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#DomainAndRange #DomainMath #Math

[alexanderkim]

I'm still confused why there are less than signs for both the first and second equations and why there aren't any less than or equal to signs?

[zzwcinq]

Thank you so much, i was struggling to understand. One question though, for the last function, would i be wrong if i wrote(-infinity, -4] U (4, infinity)?
Sorry guys can't find the infinity sign on my keyboard lol

[NCRY_]

i now fully understand the "subtract the both sides"

[jakeleo]

bro just helped me get at least a B on my first Math 111 exam