Susan Chan's answer to Tiara Delylah's Secondary 3 E Maths question.
Hi, can you explain 3e(i). Don't understand how it is derived. Thanks.
Hi, can you explain 3e(i). Don't understand how it is derived. Thanks.
Factorise out 3^(n-1) and since 3^(n-2) = 3^(n-1) x 3, you’re left with (3-1).
I see, thanks for your help :)
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