please help with 10a and 11i ! I solved 10b and 11ii myself but I can’t prove

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secondary 4 | A Maths
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secondary 4 A Maths Singapore

please help with 10a and 11i ! I solved 10b and 11ii myself but I can’t prove 10a and 11i !

Date Posted: 8 months ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

There's an error in question 11(i).

Date Posted: 8 months ago