Page 11 - Math Grade 11 (Advance)

PROEUS DARA

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ruUlH1~3 2

M H nH U?ili rnil iuHJ haHli'li n t mru{} ~H 1ti s {1 ti M nn 2:
lJ u t_; £1 !:3l
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n. ~2
k =I

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2. ~ (2n+ 1)
n=2
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?i. ~ j(j + 1)
j= I

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2
n. ~ = 2 + 2 + 2 + 2 + 2 + 2
k =I

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2. ~ (2n + 1) = 5 + 7 + 9 + 11
n=2

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f!i. ~ j(j + 1 ) = 1 X 2 + 2 X 3 + 3 X 4 + 4 X 5 + 5 X 6
j=l

n. 2+5+8+ ... +(3n-l)

2. 3+6+12+ ... +3(2t-l

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