Finding inverse functions: rational | Mathematics III | High School Math | Khan Academy

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Sal finds the inverse of g(x)=(2x-1)/(x+3).

High School Math on Khan Academy: Did you realize that the word "algebra" comes from Arabic (just like "algorithm" and "al jazeera" and "Aladdin")? And what is so great about algebra anyway? This tutorial doesn't explore algebra so much as it introduces the history and ideas that underpin it.

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Комментарии
Автор

The 1 in your answer should be negative, so

x= (-1-3y)/(y-2)

bracemouthify
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thanks!
This kinda help me to understand our lecture better...

Dylan-hxoo
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That should be negative 1 sir!!!! If count from range to domain youll see the digference

ariturbo
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I solved it a little bit different. The first time I got x=(3y+1)/(2-y), the second time x=(-1-3y)/(y-2).After substituting y with different numbers, both functions had the same x outcomes. Are the two function equations correct in this case?

valerijavalerija
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haha I'm so going to use a happy face instead of x on my exam this friday

MackySWE
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you made a mistake




the smiley face should be frowny face
:(

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