Tayng's answer to Madeline's Secondary 4 A Maths Singapore question.

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Tayng
Tayng's answer
1079 answers (A Helpful Person)
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There
Madeline
Madeline
2 months ago
Thank you so much, the answer given for (i) is with negative sign. Is the answer provided has error?
sstrike
Sstrike
2 months ago
negative sld be the correct ans, cos "decreasing"
Tayng
Tayng
2 months ago
Oops yeah
Madeline
Madeline
2 months ago
So if part i answer is negative, wont it affect part ii answer? But your part ii answer is correct when your part i answer is positive?
Tayng
Tayng
2 months ago
Hahahahahaha omg yes the answer key correct because M is now -
Then need factories out the - again
So m/9