Issue with Solve Command - Nspire CAS

[jonjoel]

Hi all,

I entered the following solve command into the Nspire CAS:

Solve(1/x + 1/y = 2/(x+y),x)

I would expect it to return either 'false' since there is no solution
or a value for x in terms of y....but instead it returns 'x = 0 and y
= 0'.

Anyone else seen this? Any idea why?

I realize that I can get it to return 'false' if I ask the Nspire to
solve for both x and y - [Solve(1/x + 1/y = 2/(x+y),x,y)]... but I'm
trying to have my students use consistent notation for several
equations that have different numbers of solutions.

Thanks for any feedback.

Jon

[Nelson Sousa]

Doesn't it add a warning at the bottom of the screen about the domain of the solution? If not, it should.

--
Nelson

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[Glenn]

jonjoel,

There are 2 complex solutions that you can get by using cSolve.
You may have to set your "Real or Complex" setting to "rectangular".

Have fun,
Glenn.