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junior college 2 | H2 Maths
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Anika
Anika

junior college 2 chevron_right H2 Maths chevron_right Singapore

Can someone please help me with this ? Thank you so so much, deeply appreciated

Date Posted: 3 years ago
Views: 258

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Boy Mow Chau
Boy Mow Chau's answer
317 answers (Tutor Details)
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for part (ii), this should be a possible method. however, the answer -44/27 looks a bit weird, so not sure if have mistake. you have the actual answers?
Boy Mow Chau
Boy Mow Chau
3 years ago
explanation ...

note that as d varies, the curve is shifted vertically up and down. the x coordinate of the turning points remain the same.

we find the value of d when the maximum point just touches the x-axis, and also when the minimum point just touches the x-axis.

outside this range of d, the curve will cross the x-axis at only one point.

note: checked on the GC; answers should be correct.
Anika
Anika
3 years ago
Hello ! Yes yes the answer is actually correct . Thank you so much for your help !