Optimization with Exponential Functions Grade 12 Calculus and Vectors Lesson 5 3 7 19 13)

[chrisoz]

You missed the coefficient (0.5) when differentiating the original E'(t) equation using product rule. You're correct that it becomes zero in the first half, however, it should remain a constant in the second part of "f'(x)g(x)+f(x)g'(x)". Ultimately it won't effect your result, however, I'm sure there'll be a few students along the way who are a bit confused and may develop bad habits.