pls help for qn 18, answer scheme says a is 4 and b is 1

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secondary 3 | A Maths
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secondary 3 A Maths Singapore

pls help for qn 18, answer scheme says a is 4 and b is 1

Date Posted: 3 months ago

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hope this helps

Date Posted: 3 months ago

done {{ upvoteCount }} Upvotes

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There

Date Posted: 3 months ago