Series test's Flashcards

1
Q

Infinite series equals to a?

A

Finite sum or infinite sum

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2
Q

what does interval of convergence mean?

A

(domain of f(x))

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3
Q

how to find interval of convergence?

A

ratio test with |absolute value|

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4
Q

Divergence test

A

Limit as n approaches infinity a sub n doesn’t equal 0

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5
Q

p-series converges

A

P>1

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6
Q

p-series diverges

A

p

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7
Q

Geometric Series converges

A

|r|

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8
Q

Geometric Series Diverges

A

|r| > 1 series diverges

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9
Q

Comparison test

A

Compare using 1/n^p or Geometric Series.

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10
Q

Comparison test converges

A

Series smaller than a converger then series converges

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11
Q

Comparision Test diverges

A

Series larger than a diverger then series diverges

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12
Q

Limit comparison test

A

lim as n approaches a sub n/b sub n : use when a sub n is a rational function

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13
Q

Ratio Test converges

A

0

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14
Q

Ratio Test diverges

A

r > 1

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15
Q

Ratio test fails

A

r = 1

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16
Q

use ratio test when

A

there are factorials or when there is Geometric series with other stuff

17
Q

root test converges

A

0

18
Q

root test diverges

A

r > 1 diverges

19
Q

r = 1

A

test fails

20
Q

Alternating series first test

A

Check absolute convergence - any test

21
Q

Alternating Series test (leibniz’s test) diverges if

A

diverges if the lim as n approaches infinity does not equal 0