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junior college 1 | H2 Maths
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stephanie
Stephanie

junior college 1 chevron_right H2 Maths

i can't manage to do all 3 parts, the answer key given is
(a) (n/6)(n+1)(2n+19)
(b) (n/3)(28n^2 -1)
(c) 3930
thank you!

Date Posted: 6 years ago
Views: 511

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Kelvin Kaung
Kelvin Kaung's answer
7 answers (Tutor Details)
1st
Kelvin Kaung
Kelvin Kaung
6 years ago
Sorry this is incorrect. Below is correct
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Kelvin Kaung
Kelvin Kaung's answer
7 answers (Tutor Details)
Abit messy but hope it helps. You need to break the equation up and you need to know the formula for sum of arithmetic progression. If you don't know what that is you gotta revise and check your text book.