Introduction to Inverse Functions

From Thinkwell's College Algebra
Chapter 3 Coordinates and Graphs, Subchapter 3.8 Inverse Functions

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"Does every function have an inverse? Darnit NO!" Love this guy

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no

[@Sajadhussainbarbra]

Two function are inverse if they are symtric For inverse function Function must one to one

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[@justinaacuriouswanderer1496]

Comment for myself to 5:42 come back to: Regularly, we plug x’s in functions of y. In this, we want a function that gives us a y! Not the other way around. So we we basically want a function of X that gives out a Y instead of a function of Y that gives out an x. So in this case, the function of X was “x+3/2”

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[@maryflorencebibbin9789]

Excellent narrative of inverse functions {simple as a piece of ice into water }

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[@leonhardeuler9839]

So y=x² is the best function to encode a message?

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What part is the rolling machine?

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Thank u very much

[@sirkyurem6463]

How did you get from 2x-3, to x+3 all divided by two? Please explain in reply.

[@anthony486]

reverse it all, so x-3 is x+3, and since it's 2x you divide by 2

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[@shloksand2926]

So basically only bijective functions have inverses

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but the example is good....

[@mistermonsieur5162]

i think -2squared is actuaally -4 not 4

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+abdullahi abdirahman A square root can never be a negative.

[@wisewarrior661]

What Tiff said and also -2^2 is the same as -2 times -2. Negative times a negative equals a positive.

[@the.real.cia.langley]

Actually if you multiply -2 with -2 you'l get positive 4, and this is because - minus multiplied by - is +.

[@hassankritical5710]

Hmmmm, buh I thought the square root of 4 is plus or minus 2.

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