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junior college 1 | H2 Maths
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chloe
Chloe

junior college 1 chevron_right H2 Maths chevron_right Singapore

hi! pls help me!

Date Posted: 2 years ago
Views: 529

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Eric Nicholas K
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5997 answers (Tutor Details)
1st
Q2a
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Eric Nicholas K
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Q2b

The second part of this question is done with the fact that one sequence shows a string of cubes of odd numbers and the other shows a string of cubes of even numbers.

An alternative method is to expand (2r - 1)^3 out and then using the results for the summation of n^2 and n^3 as given in both parts.

If you need me to write up this alternative method, let me know.