Topic: Help

I dont know how to write these functions in Graph

y= 3x/(x+2)^2
y=√x - 5x

Re: Help

You'll find your functions in pict. 1.
Please note that only real results are shown for the second function. Complex solution for any value x<0 can be found in Evaluate dialogue (Ctrl-E).

The equation  "y=√x - 5x" returns real solutions for x>=0, and complex solutions for x<0:
y= - 5x + i*sqrt(-x) ;
In picture 2 results in complex plane are shown, with x values advancing in 0.1 steps, just for better imagination.

Post's attachments

Attachment icon Kanglee1.grf 715 b, 397 downloads since 2010-05-14 

Attachment icon Kanglee2.grf 2.41 kb, 406 downloads since 2010-05-14 

Re: Help

thank you