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Find and classify all the stationary points of the function f(x) = x^3 - 3x^2 + 8

Stationary points occur when the gradient of the function is zero. They can be visualised on a graph as hills (maximum points), as troughs (minimum points), or as points of inflection. (I would draw all thre...
RB
Answered by Ryan B. • Maths tutor
13704 Views

What is an enzyme?

An enzyme is a protein which acts as a biological catalyst, to speed up reactions. It has an active site which is a very specific shape to allow it to bond to a particular reagent and catalyse a specific bio...
RH
Answered by Rachel H. • Biology tutor
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I am finding it difficult to fill in this sentences in one of the AQA A-level past papers. Could you help? 1)他最喜欢篮球，我给他??? 了一双球鞋。Possible Answers: A 头 B 卖 C 买

No problem! Let's look at this sentence together. 1) 他最喜欢篮球，我给他??? 了一双球鞋。 So this sentence literally means "(Since) he really likes basketball, I ??? him a pair of trainers." Now in this space in E...
AH
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I still don’t really understand how the Subjunctive tense works in Spanish…. Could you explain it to me?

No worries! The subjunctive is tricky at the best of times. But let me take you through it step by step. Features of Sentences that Use the Subjunctive There are three main features that most sentences that ...
AH
Answered by Alexandra H. • Spanish tutor
3122 Views

Che cosa hai fatto durante l'estate?

Quest'estate, dopo aver dato gli esami, sono andato in vancanze con i miei migliori amici. Abbiamo preso l'aereo per andare in Pologna, a Cracovia: là, in un gruppo di sette avevamo prenotato un gran apparta...
JH
Answered by Jack H. • Italian tutor
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