Someone explain this two question. Thanks

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secondary 4 | A Maths
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secondary 4 A Maths Singapore

Someone explain this two question.
Thanks

Date Posted: 5 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

3(b) is using similar binomial expansion as (a)

Date Posted: 5 years ago

Kathy

5 years ago

Can I know for 3a how u get 8,28,56....