maths general term

2009-08-01 12:07 am
Plz help me to solve this question.

Write down the general term of 3,6,12,24,48...

Thanks for help!!!!

回答 (1)

2009-08-01 12:23 am
✔ 最佳答案
The 1st term = 3 = 3 X 1 = 3 X (2)0

The 2nd term = 6 = 3 X 2 = 3 X (2)1

The 3rd term = 12 = 3 X 4 = 3 X (2)2

The 4th term = 24 = 3 X 8 = 3 X (2)3


By observation, we have the general term, i.e. the nth term

= 3 X (2)n-1

參考: Physics king


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