hi. i am a freshman majoring in mechanical engineering and i really love math. i am in calculus II right now during my first semester. as a mechanical engineering major, my university requires that engineers only take calculus I, II, and III and differential equations. i already had a bunch of credit from high school which frees me up to take a couple of electives. i am planning on taking calc III and differential equations next semester but i don't know what math electives i should take beyond that. i am stuck between a class on partial derivatives and calculus IV (introductory analysis). any help with a decision would be greatly appreciated!!!!