Maths AS past paper questions (C1 and C2) Watch

Adorable98
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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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Pablo Picasso
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f(x-1) =to the right 1
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Zacken
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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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Zacken
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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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Adorable98
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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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Zacken
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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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Funnycatvideos
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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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Adorable98
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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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Funnycatvideos
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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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Adorable98
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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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Funnycatvideos
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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
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Adorable98
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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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