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    Could someone please help me with the following questions..


    So I did (a) but couldn't solve (b) and (c)?


    I couldn't solve this question..

    This one too ..
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    f(x-1) =to the right 1
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    (Original post by Adorable98)
    Could someone please help me with the following questions..


    So I did (a) but couldn't solve (b) and (c)?
    Write out u1 to u9 - what pattern can you spot?
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    (Original post by Adorable98)

    This one too ..
    You'll need to be more specific about this one.
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    (Original post by Zacken)
    You'll need to be more specific about this one.
    I don't know how to solve (a),(b)and (c) ??
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    (Original post by Adorable98)
    I don't know how to solve (a),(b)and (c) ??
    (a) is the cosine curve shifted pi/3 to the right; there's not much I can do to explain it, you should know your trig graphs and your function transformations.

    (b) is just \cos y = 0 (which you should know how to solve) and then back-substitute y = x - \frac{\pi}{3} and solve for x.

    (c) is just \cos y = \frac{1}{\sqrt{2}} (Which you should know how to solve, one of the solutions is y = \frac{\pi}{4}) and then back-sub and solve for x.

    Perhaps you need to work on your concepts more before moving on to past papers?
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    (Original post by Adorable98)
    Could someone please help me with the following questions..


    So I did (a) but couldn't solve (b) and (c)?


    I couldn't solve this question..

    This one too ..
    I got 40 and 5/8 for the logarithm question.
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    (Original post by Funnycatvideos)
    I got 40 and 5/8 for the logarithm question.
    Yeah, I actually just solved it now!!
    Thank you!!
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    (Original post by Adorable98)
    Yeah, I actually just solved it now!!
    Thank you!!
    You're very welcome.
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    (Original post by Zacken)
    (a) is the cosine curve shifted pi/3 to the right; there's not much I can do to explain it, you should know your trig graphs and your function transformations.

    (b) is just \cos y = 0 (which you should know how to solve) and then back-substitute y = x - \frac{\pi}{3} and solve for x.

    (c) is just \cos y = \frac{1}{\sqrt{2}} (Which you should know how to solve, one of the solutions is y = \frac{\pi}{4}) and then back-sub and solve for x.

    Perhaps you need to work on your concepts more before moving on to past papers?
    Yeaah you're right!! Thaaank you!!
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    (Original post by Adorable98)
    Could someone please help me with the following questions..


    So I did (a) but couldn't solve (b) and (c)?


    I couldn't solve this question..

    This one too ..
    For the Geometric sequences:
    a)You use ar^n-1 a=300 r=1.05 n=24 so: 300*(1.05)^23=921.46=922 phones
    b)You use the summation formula. I substituted the values in and I got 13351
    c) You have to use ar^n-1 again:
    300*1.05^N-1>3000
    1.05^N-1>10
    Take logs:
    (N-1)log1.05>log10
    N-1>log10/log1.05
    N-1>47.19....
    N>48.19...
    N>48
    • Thread Starter
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    (Original post by Funnycatvideos)
    For the Geometric sequences:
    a)You use ar^n-1 a=300 r=1.05 n=24 so: 300*(1.05)^23=921.46=922 phones
    b)You use the summation formula. I substituted the values in and I got 13351
    c) You have to use ar^n-1 again:
    300*1.05^N-1>3000
    1.05^N-1>10
    Take logs:
    (N-1)log1.05>log10
    N-1>log10/log1.05
    N-1>47.19....
    N>48.19...
    N>48
    Thanks
 
 
 
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