but i still couldn't resist.

Hi.

solve(sin(x)+cos(x)=sqrt(2))=> CP:Sorry boss, I can't, please solve this graphically.

with OS 3.01 the CP shows: x=2 * pi * constn(1) +pi/4

But here:

sum(1/(x^2+x+1),x,1,10)=> CP: please wait 0.5 sec.sum(1/(x^2+x+1),x,1,12)=> CP: please wait more than 3 sec. (Why is it slow while adding two more number?)

to me it is not quite clear, what the poster wanted to do.

The "sum" command from the "action->List-Calculation" completely refuses any work to both formulas.

(In above mentioned OS)

Error message: "wrong number of arguments"

Volker