Toronto Math Forum

MAT244--2020F => MAT244--Test & Quizzes => Test 2 => Topic started by: YuyingC on October 28, 2020, 11:13:14 PM

Title: TT2-2019 Past Test, Morning Sitting
Post by: YuyingC on October 28, 2020, 11:13:14 PM
For the morning sitting question in 2019 TT2, why is C2' = e^t/(e^t+1)?
Title: Re: TT2-2019 Past Test, Morning Sitting
Post by: Jing_Wang on October 29, 2020, 01:26:28 AM
I encountered the exact same problem and I think (C2)' should equal -e^t/(e^t+1).
Consequently, the constant c2 I find for part (b) is ln2 instead of -ln2.
Also, if it is intended in the question that g = 12/(e^t+1), most things in the solution are to be multiplied by a factor of 6.
Title: Re: TT2-2019 Past Test, Morning Sitting
Post by: YuyingC on October 29, 2020, 06:36:33 AM
Yes, I have got the same answer as you. Doubt that the solution is incorrect.