Hii can someone help me pls? Thanku!

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junior college 2 H3 Maths Singapore

Hii can someone help me pls? Thanku!

Date Posted: 8 months ago

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Date Posted: 8 months ago

Rella

7 months ago

Can I also ask why for part 3, the delta is not minus, but plus? i thought the since delta is the decrease in d, we just sub d into d-delta?