1. The problem statement, all variables and given/known data The problem, more like a riddle, that our teacher gave it to us was to find the error in this particular equation: integral of 1/x dc = ln (absolute value of (x)) + C ; perfectly fine integral of dx/3x = 1/3 integral of dx/x ; also fine 1/3 integral dx/x = 1/3 ln (absolute value of x) + C ; not sure from here integral of dx/3x ≠ 1/3 ln (absolute value of 3x) + C 3. The attempt at a solution I have trying to figure out from step by step, however, I do not find what is wrong or what the error is. Could someone help with this problem? Thanks!