Hi

I'm using line by line reasoning and got the following problem. I would like to evaluate first the expression and after the result given by y students. But when i put all the information in "Question variables" all the expressions (like diff and integral) are evaluated. Found a solution for diff, to put before functions the character '. It's work for diff but not for int. int is always evaluated. Any idea of the problem ?

You have below what i put in "Question Variables"

eq: v_chmoy= 'int(v_ch, t, 0, T)/T

eq2:v_chmoy = 'int(V_E, t, 0, alpha*T)/T

sol:int(V_E, t, 0, alpha*T)/T

ta:[eq, eq2, v_chmoy = eq]

Regards Thierry