sstrike's answer to lana <3's Secondary 4 A Maths Singapore question.

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sstrike
Sstrike's answer
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lana <3
Lana <3
11 months ago
the ans says +- 16.2. I got the same ans as you but idk how to find -16.2
sstrike
Sstrike
11 months ago
Yes. Common ratio sold be ±0.6
-0.6 was missed out here