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junior college 1 | H2 Maths
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Please help with Q2. Thanks in advance
Date Posted: 7 years ago
Views: 671
Try splitting the terms 3^r, 3r and 3.
You will notice 3^r and 3r follows a GP formula while summation of 2 (3) is 6n.
Sub the GP formula separately for 3^r and 3r.
Then add everything together.
Hope that helps:)
You will notice 3^r and 3r follows a GP formula while summation of 2 (3) is 6n.
Sub the GP formula separately for 3^r and 3r.
Then add everything together.
Hope that helps:)
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done
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Q2) You can break the question into finding the sum of three different series (geometric series, arithmetic series, and a constant number) which all have n+2 terms (r=-1,0, 1, ...,n).
Q3) Please take note that you should the formulas for arithmetic and geometrical series as there is no information about the series. You should simply use a(n)=s(n)-s(n-1) to find the answer.
Q3) Please take note that you should the formulas for arithmetic and geometrical series as there is no information about the series. You should simply use a(n)=s(n)-s(n-1) to find the answer.
Date Posted:
7 years ago
Thank you so much:)
Thank you so much:)
Thank you so much:)
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