Pls help me with part (v). I can't seem to substitute the r to find the one in t

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junior college 1 | H2 Maths
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junior college 1 H2 Maths

Pls help me with part (v). I can't seem to substitute the r to find the one in this question. Thanks

Date Posted: 6 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

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Date Posted: 6 years ago