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junior college 1 | H1 Maths
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huihuibuhui
Huihuibuhui

junior college 1 chevron_right H1 Maths chevron_right Singapore

Hi, I need help with this question. Thank you so much. :)

Date Posted: 2 years ago
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Christmas MT
Christmas Mt's answer
2903 answers (A Helpful Person)
To do the first part, we first need to differentiate the equation with respect to t. Dx/dt would need to be >0 in order to be increasing with t. Hence, we complete the square and we recognise that the k value needs to be >48 for the dx/dt to be >0. The other parts can be solved using GC.