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secondary 4 | A Maths
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secondary 4 chevron_right A Maths chevron_right Singapore

Help to solve part (iii)

Date Posted: 4 years ago
Views: 220
Eric Nicholas K
Eric Nicholas K
4 years ago
The coefficients 2, -3, -k and 6 are reversed in order.

"Let x = 1/u".
Eric Nicholas K
Eric Nicholas K
4 years ago
2 - 3/u - k/u^2 + 6/u^3 = 0

Multiplying throughout by u^3,
2u^3 - 3u^2 - ku + 6 = 0

And use results in part ii to solve it for the value(s) of u, then convert back to 1/x and solve for x.

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
An idea
MM
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4 years ago
Understood
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4 years ago
Thank you