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Okay i think i get it so order isnt important when 3 are selected but it is when they are on the table?

the answer is 168

Oh so is it because we are not interested in the actual seating arrangements of the 3 who sit at the table but rather the combinations of the 3 of 9 who can sit at the table.

Thank you

Why do we divide by 3 if it is circular?

(d) There are 9 friends. Once they get to the nightclub, there is only a table for 3 available, and the others will have to stand up. If the friends randomly assign who sits at the table, in how many different ways can they be seated.

1) 8-4+2-.... Which term of the following series is 1/128 2)Find the term of the series 2/7+6/7+18/7+... that is greater than 100

Such an annoying topic

Hey so I'm doing the year 12 maths 2 unit course (not the general) and i was doing some half yearly papers and I noticed about 8 marks worth of questions were consumer arithmetic. So my question is, is consumer arithmetic an assessable topic in this years hsc 2 unit exams.

Yeh I already own the 2 unit cambridge book but i'll probably get fitz as well cause i hear the hardest questions are in there

Yeah I haven't quite done much work in the Fitz patrick however I like the progressive exercises of the cambridge quite a lot

So basically my school only uses maths in focus however I understand that the questions are bad,basic and repetitive, but should I just totally stop using it and move onto Cambridge or Fitz, as my school doesn't check home work. By the way I'm not a struggling student, just wondering if I should...

Thank you everyone much appreciated:spin:

yes but i dont know where to go from there

I cant seem to solve for x after the first derivative

Do i need to find the stationary points?

sorry its the wrong way round should be <

Using calculus. sketch the graph of y=cosx(1 +sinx) for 0>x>2pie (the ">" are greater than or equal)

flathead

Thank you