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integrate [xe^(-x)] with respect to x.

integrating a product of functions of x - integration by parts. integral of uv' = uv - integral of u'v. choice of u from LIATE - logs, inverse trig, algebra, trig, exponentials - choose u=x. u=x, v'=e^(-x...

ZP
Answered by Zachary P. Maths tutor
17127 Views

How do I form the imperfect subjunctive/conditional sentences?

Follow the following structure: Si + imperfect subjunctive +conditional phrase: This structure explains an action that could happen if the circumstances of something were a certain way: e.g. If I could, I...

NN
Answered by Nikol N. Spanish tutor
5787 Views

What are common A*/higher level phrases/fillers I can use in my speaking exam?

The Spanish speaking exam has to demonstrate strong content, and vocabulary, so my first suggestion would be to revise bullet points with good vocabulary on all the topics that might come up. Reading arti...

NN
Answered by Nikol N. Spanish tutor
42481 Views

Two lines have equations r_1=(1,-1,2)+a(-1,3,4) and r_2=(c,-4,0)+b(0,3,2). If the lines intersect find c:

If the lines intersect the position vectors r_1 and r_2 must be equal at the point of intersection, so: (1,-1,2)+a(-1,3,4)=(c,-4,0)+b(0,3,2) which gives three equations for the three components: 1-a=c, -1...

AZ
Answered by Aleksandar Z. Maths tutor
4536 Views

Should you structure your argument in an essay by writing one side and then the other, or write it paragraph by paragraph?

Both of these are acceptable, but I would advise writing it paragraph by paragraph, as quite often students run out of time in the exam and that way at least you've covered both sides of the argument. It ...

SB
6525 Views

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