Tee Yuan Qin's answer to LYY's Secondary 4 A Maths Singapore question.

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Tee Yuan Qin
Tee Yuan Qin's answer
44 answers (Tutor Details)
1st
solve a with the given information. Substitute a into dydx to find out the sign of dydx. if dydx<0, y is decreasing, if dydx>0, y is increasing.

side note: I dont think you can solve this question without first solving for 'a'.