- #1
ivan77
- 17
- 0
Hi,
there is a proof of the ratio test that I have seen a couple of times here:
http://tutorial.math.lamar.edu/Classes/CalcII/RatioTest.aspxI don't know how to use latex, so abs(x) will mean absolute value
I am ok with this:
abs( aN+1) < r abs(aN)
I don't understand where the r2 come from in the next line
abs( aN+2) < r abs(aN+1)< r2 abs(aN)
Similarly, I don't understand how to get to the generalization of
abs( aN+k) < rk abs(aN+1)I should probably add that I understand all other aspects (i.e. using comparison test), but since I don't understand this part, my understanding of the proof fails.
Thanks,
Ivan77
there is a proof of the ratio test that I have seen a couple of times here:
http://tutorial.math.lamar.edu/Classes/CalcII/RatioTest.aspxI don't know how to use latex, so abs(x) will mean absolute value
I am ok with this:
abs( aN+1) < r abs(aN)
I don't understand where the r2 come from in the next line
abs( aN+2) < r abs(aN+1)< r2 abs(aN)
Similarly, I don't understand how to get to the generalization of
abs( aN+k) < rk abs(aN+1)I should probably add that I understand all other aspects (i.e. using comparison test), but since I don't understand this part, my understanding of the proof fails.
Thanks,
Ivan77
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