Please help a returning mature student...
Help needed with 2 Differentiation Questions.
Q= 2e^x + e^-2x
A= 2e^x + -2e^-2x
Why would they keep 2e^x in the answer ?
I do understand the -2e^-2x part though managed to work that one out correctly..
Q= sin(-8Q) the Q is supposed to be theta dont know how to write it on keyboard.
A= I would tend to give -8 Cos -8Q but the actual answer is
-8Cos(-8Q)=-8Cos 8Q. So I dont understand how they come to that please help.
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Maths Diff Question confusion Pls help watch
- Thread Starter
- 24-09-2010 00:05
- 24-09-2010 00:22
For the first part, when you differentiate 2e^x, you get 2e^x so it just looks odd.
As for the -8cos8Q part, note that cos(-Q) = cos(Q). They probably just wanted you to simplify it using that little trick.