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secondary 4 | A Maths
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mint
Mint

secondary 4 chevron_right A Maths chevron_right Singapore

please help thank you !

Date Posted: 5 years ago
Views: 218

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
Just one more step needed: sun x = -1 into the answer (NOT x = 1, since 5x = -5 earlier).