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iRpervert · Posted: Wed Sep 02, 2009 4:48 pm Post subject: Help me with Math please?

Number 25.
Let f(x)= 2x^3 + 5x + 3. If f-¹(x)=1. Find x.

f-¹(x) that is inverse of f(x).

thanks in advance Very Happy

Lyfa · Posted: Wed Sep 02, 2009 4:48 pm Post subject:

iRpervert · Posted: Wed Sep 02, 2009 4:50 pm Post subject:

How did you find it?

Lyfa · Posted: Wed Sep 02, 2009 4:52 pm Post subject:

DURAN · Posted: Wed Sep 02, 2009 4:52 pm Post subject:

Let f(x)= 2x^3 + 5x + 3. If f-¹(x)=1

Here it is.

iRpervert · Posted: Wed Sep 02, 2009 4:54 pm Post subject:

what do you mean Duran? am i suppose to substitute 1 in the eqaution?

Lyfa · Posted: Wed Sep 02, 2009 4:54 pm Post subject:

Slugsnack · Posted: Wed Sep 02, 2009 4:55 pm Post subject:

there are 2 imaginary solutions and -0.378

inverse is 1 over. invert both sides since it's equal to 1 and you get original quadratic = 1. minus 1 from both sides then solve the remaining cubic, was lazy and did on calculator

Lyfa · Posted: Wed Sep 02, 2009 4:56 pm Post subject:

iRpervert · Posted: Wed Sep 02, 2009 4:56 pm Post subject:

uhh..i'll try..

Slugsnack · Posted: Wed Sep 02, 2009 4:57 pm Post subject:

Lyfa · Posted: Wed Sep 02, 2009 4:58 pm Post subject:

Now help me with mine: 1+2=?

iRpervert · Posted: Wed Sep 02, 2009 4:59 pm Post subject:

>.> forreals anyone know how to do it?

Slugsnack · Posted: Wed Sep 02, 2009 5:00 pm Post subject:

i fucking just told you..

Lyfa · Posted: Wed Sep 02, 2009 5:00 pm Post subject:

It's for real. I'm not joking in any way, shape, or form