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junior college 2 | H3 Maths
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Need help!!!thanks
Date Posted: 4 years ago
Views: 626
I wonder what warrants the discrepancy in marks credited for the two parts. The solutions execute similar ideas in near-identical length, barring the hint inserted. Should the problem contributors really weigh the inclusion of the hint as 4 full points deducted from presentation? Ok enough of that english. But really why part two so many more marks than part one
Probably is a issue on the Cambridge side since this is one of those S paper questions the poster has been uploading
great thanks for your solutions
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Alternative working without actually writing it as a sum of the terms or subtracting equations :
Sn - kS(n-1) = c
Based in question's instructions,
S(n-1) - kS(n-2) = c
So Sn - kS(n-1) = S(n-1) - kS(n-2)
Sn - S(n-1) = k( S(n-1) - S(n-2) )
un = k u(n-1)
un / u(n-1) = k
Common ratio k so it's a G.P
Sn - kS(n-1) = c
Based in question's instructions,
S(n-1) - kS(n-2) = c
So Sn - kS(n-1) = S(n-1) - kS(n-2)
Sn - S(n-1) = k( S(n-1) - S(n-2) )
un = k u(n-1)
un / u(n-1) = k
Common ratio k so it's a G.P
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