18. Useful Sums Flashcards
1
Q
(a + b)^{n}
A
2
Q
\sum_{n=0}^{\infty} x^{n}
A
3
Q
\sum_{n=0}^{\infty} nx^{n-1}
A
4
Q
\sum_{n=0}^{\infty} n(n-1)x^{n-2}
A
5
Q
\sum_{n=0}^{\infty} n(n-1)(n-2)x^{n-3}
A
6
Q
e^{x}
A
7
Q
\sum_{k=1}^{n} k
A
8
Q
\sum_{k=1}^{n} k^{2}
A
9
Q
e^{x} >= …
A
10
Q
…/e^{x} -> 0
A
11
Q
\sum_{k=0}^{n} ar^{k}
A
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