TI-89 Titanium: Drawing the inverse.

**tupac** · July 4th 2008, 11:42 AM

What do i need to press if i want to draw the inverse of f(x)=x+5x^4 for example?

**Chris L T521** · July 4th 2008, 12:15 PM

Originally Posted by tupac

What do i need to press if i want to draw the inverse of f(x)=x+5x^4 for example?

The only thing I can think of at the moment is this: write the equation as parametric equations. Since $y=x+5x^4$ , the inverse would be $x=y+5y^4$ . Now, if we left $y=t$ , then $x=t+5t^4$ .

You can now plug this into your calculator. Make sure you're in parametric mode!

**galactus** · July 4th 2008, 12:15 PM

I do not know of such a capability. If you find one, let me know.

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