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secondary 3 | E Maths
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Tiara Delylah
Tiara Delylah

secondary 3 chevron_right E Maths

I need help with part e)

Date Posted: 6 years ago
Views: 422

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Susan Chan
Susan Chan's answer
202 answers (Tutor Details)
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Hope it helps
Oscar
Oscar
6 years ago
Hi, can you explain 3e(i). Don't understand how it is derived. Thanks.
Oscar
Oscar
6 years ago
Hi, can you explain 3e(i). Don't understand how it is derived. Thanks.
Susan Chan
Susan Chan
6 years ago
Factorise out 3^(n-1) and since 3^(n-2) = 3^(n-1) x 3, you’re left with (3-1).
Oscar
Oscar
6 years ago
I see, thanks for your help :)