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    HSC 2016 Maths Marathon (archive)

    Re: HSC 2016 2U Marathon Yep Im pretty sure 3x+y-5=0 is the normal. Ty and also would that mean c=7
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    HSC 2016 Maths Marathon (archive)

    Re: HSC 2016 2U Marathon Differentiate y=x^2 + bx + c and hence find values of b and c if the line 3x+y-5=0 is a normal to the curve at the point X(3,-1).
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    Cambridge HSC MX1 Textbook Marathon/Q&A

    Re: Year 12 Mathematics 3 Unit Cambridge Question & Answer Thread having trouble with this binomial question
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    English Essay Marking

    Hey guys, so I'm just wondering if there is anyone i can PM to mark my english essay/give me feedback. Thank you!!!
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Okay tyvm I understand now. I was originally looking in the year 11 3u Cambridge book for permutations and combinations but couldn't find it.
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Ah so u were working it out for 40000 and not 4000?
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread I don't understand how the answer wouldn't be 60 for b) since there are 5 numbers that can form 5 digits, which are greater than 4000. And the question doesn't say how many digits the number over 4000 can be. However, I...
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread So im not quite sure how to do questions b,c & d, and just out of curiosity how would you find how many 4 digit numbers are even.
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    Big Bang question

    Hey guys, I would really appreciate it if someone could help me with this question. Describe how the Milky Way could have formed, including accretion and cooling of the universe in your answer.
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    Mathematical induction

    How would u do question 2, 3 and 4 I couldn't do step 3 on them
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    Mathematical induction

    We'll start off with some of these
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    Mathematical induction

    Okay guys, so I'm making this new thread for anyone who wants to practice induction.
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Hey guys, need help with these questions on polynomials and induction
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    Prelim Physics Thread

    okay thanks heaps, and just wondering if the gravitational force is the same as the centripetal force
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    Prelim Physics Thread

    Yeah sorry I meant 6.0x10^24 and the question says at a distance of 145km.
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    Prelim Physics Thread

    Hi guys, I'm unsure about how to do this circular motion question: Calculate the gravitational force acting on earth if earth orbits the sun at 145 million km and has a mass of 6x10^23kg.
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread No, the question just asked to solve. Also, calculators like wolfram alpha only got 27 as well
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread answers say n=27 even though i did those steps
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread can someone please explain how n only = 27 and not ±27 in the equation n^(2/3) = 9
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    Cambridge Prelim MX1 Textbook Marathon/Q&A

    Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Use mathematical induction to prove that for all positive integers n: a) a)
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