Qualification > Math
C1 and C2 DOUBTS HERE!!!!!
Saladin:
--- Quote from: YU-GI-OH! on April 27, 2012, 06:29:35 pm ---May someone please solve question 5b of the June 2011 C2 paper for me.
Thanks in advance :)
--- End quote ---
Don't have the paper on me. Next time, please attach the paper.
xainer:
--- Quote from: Saladin on August 25, 2012, 03:13:04 pm ---@xanier:
(a) Common difference = 60
Therefore, value on 30th year = 60(30) + 740
(b) (n/2)(2a + (n-1)d)
= (30/2)(2(800) + (29)60)
= 50100
(c) You just use the equation in (b) and equate it to 6500, and solve for n. You get something like 35.45..so 36...
Also, if the person does not increase his amount after the 30th year, it will still take 36 years.
Read the question again, maybe that will help you out.
--- End quote ---
okay. will try. thanks for the quick reply! :)
xainer:
--- Quote from: Saladin on August 25, 2012, 03:13:04 pm ---@xanier:
(a) Common difference = 60
Therefore, value on 30th year = 60(30) + 740
(b) (n/2)(2a + (n-1)d)
= (30/2)(2(800) + (29)60)
= 50100
(c) You just use the equation in (b) and equate it to 6500, and solve for n. You get something like 35.45..so 36...
Also, if the person does not increase his amount after the 30th year, it will still take 36 years.
Read the question again, maybe that will help you out.
--- End quote ---
can u tell hw to do that qustn without using calculator? the numbers are very big n using the quadratic formula doesn't give a whole number inside the square root. i checked using calculator...
xainer:
Can anyone please give a link or document which explains about differentiation? especially the introductory part?
astarmathsandphysics:
http://www.astarmathsandphysics.com/a_level_maths_notes/C1/a_level_maths_notes_c1_differentiation.html
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