6 articles trouvés pour ce sujet.
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A geometric series |
2018-03-13 |
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nathi pose la question :
Hi I am really struggling with this question please help !!!!
a pohutukawa tree is 86 centimetres when it is planted. in the first year after it is planted , the tree grows 42 centimetres in height.Each year the tree grows in height by 95% of the growth of the previous year.
assume that the growth in height of the pohutukawa tree can be modelled by a geometric sequence.
A)find the height of the tree 5 years after it is planted and figure out the maximum height the pohutukawa tree is expected to reach in centimetres.
The maximum height part is not answered.
Penny Nom lui répond. |
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1+2+4+8....= -1 |
2012-04-02 |
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Andy pose la question :
In this minutephysics video, it's claimed that 1+2+4+8....= -1
Is this true, and if so, how?
< href="http://www.youtube.com/watch?v=kIq5CZlg8Rg">http://www.youtube.com/watch?v=kIq5CZlg8Rg
Robert Dawson lui répond. |
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The sum of a series |
2011-11-07 |
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Rattanjeet pose la question :
Find the sum of 1(1/2) + 2(1/4) + 3(1/6) + 4(1/6)(3/4) + 5(1/6)(3/4)2 + 6(1/6)(3/4)3+ ... where 1/6 + (1/6)(3/4) + (1/6)(3/4)2 + ... constitutes a geometric series.
Penny Nom lui répond. |
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Infinite Logarithmic Series |
2011-08-08 |
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Sourik pose la question :
Dear Expert,
In my Amithabha Mitra and Shambhunath Ganguly's "A Text Book of Mathematics" I found the formula of log (1+x) where the base is e and x lies in between -1 and +1.As I want to learn Mathematics,I am not satisfied with the mere statement of the formula.Please help giving me the full proof.
Thanking you,
Sourik
Robert Dawson lui répond. |
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Sigma from 0 to infinity of (n^3 / 3^n) |
2006-11-15 |
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Cedric pose la question :
I'm wondering how you would find if this series converges or diverges?
Sigma from 0 to infinity of (n^3 / 3^n)
Does the n^3 dominate, or does the 3^n dominate? What about higher powers like n^10 / 10 ^ n ? Which one would dominate then?
Penny Nom lui répond. |
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An infinite series |
2000-12-16 |
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John pose la question :
summation(n=1 to infinity)[n sin(1/(2n))]n
Harley Weston lui répond. |
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