## O-Level Additional Math

PSLE marks the graduation of Primary school students and their entry into Secondary schools as teenagers. Discuss all issues about Secondary schooling here.
KSP2013777
OrangeBelt
Posts: 92
Joined: Fri Dec 28,

### Re: O-Level Additional Math

Thank you very much, jieheng.

KSP2013777
OrangeBelt
Posts: 92
Joined: Fri Dec 28,

### Re: O-Level Additional Math

How to do (ii) ? I can do the first part but second part I got different answer.

TIA

jieheng
BrownBelt
Posts: 613
Joined: Thu Mar 24,
Total Likes:3

### Re: O-Level Additional Math

KSP2013777 wrote:How to do (ii) ? I can do the first part but second part I got different answer.

TIA
Last edited by jieheng on Sun Aug 16, 2015 12:09 am, edited 1 time in total.

KSP2013777
OrangeBelt
Posts: 92
Joined: Fri Dec 28,

### Re: O-Level Additional Math

Hi jieheng,
Ans key for max height 2.9m, min height 0.3m
For part (ii) ans key is 02:51, 07:39, 14:51, 19:39
Maybe ans key is wrong.? Pls help. Tks

jieheng
BrownBelt
Posts: 613
Joined: Thu Mar 24,
Total Likes:3

### Re: O-Level Additional Math

KSP2013777 wrote:Hi jieheng,
Ans key for max height 2.9m, min height 0.3m
For part (ii) ans key is 02:51, 07:39, 14:51, 19:39
Maybe ans key is wrong.? Pls help. Tks
Hi ,

Answer key is correct.

KSP2013777
OrangeBelt
Posts: 92
Joined: Fri Dec 28,

### Re: O-Level Additional Math

Hi. Can somebody please help me with these 2 questions. ?

Thank you.

KSP2013777
OrangeBelt
Posts: 92
Joined: Fri Dec 28,

### Re: O-Level Additional Math

Pls help me with this question. I can do (i) but can't do (ii). Pls help.

Thank you.

shurley197323
BrownBelt
Posts: 601
Joined: Fri Nov 07,

### Re: O-Level Additional Math

Can someone help question 3(ii) please.

Thank you.

shurley197323
BrownBelt
Posts: 601
Joined: Fri Nov 07,

### Re: O-Level Additional Math

Can someone help question 5.

Thank you.

KSP2013777
OrangeBelt
Posts: 92
Joined: Fri Dec 28,

### Re: O-Level Additional Math

When I substitute, I get
2000=A ln (2k+ 1)
4000= A ln (5k +1)

But, I don't know how to solve this type of simultaneous equations. Somebody, Pls help me. Tks.