First time here? Check out the FAQ!
answered 2017-06-26 15:03:03 +0100
Answer to the second question:
solve returns a list of solutions. So you get something like solve([equ1,[equ2]],k,C).
solve
solve([equ1,[equ2]],k,C)
You have to refer to an equation in the list:
solve([k^3==4*C,equC[0]],k,C)