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Find the sum of the first 46 terms of the following series, to the nearest integer

12, 15, 18

User Hayle
by
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1 Answer

2 votes

Answer: 3657

Explanation:

18-15=3

15-12=3

3 ==> rate of change per term

3*46=138

138-3=135

135+12=147 ==> 46th term

Now find the average of the first and 46th term of the sequence:

(147+12)/2=

159/2=79.5

Now multiply the average by 46 to find the sum of the sequence.

79.5*46=

159*23=3657 ==> sum of 46 terms

User Andriy Antonov
by
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