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geometric progression

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A geometric progression 2016-03-03
Pauline pose la question :
A woman measures the height of her child at birth and at monthly intervals afterwards.The child's height increases by 5% per month. Find the number of measurements she has made before the child's height is twice what it was at birth
Penny Nom lui répond.
A tree growth modelled by a geometric series 2012-02-08
Steph 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

Penny Nom lui répond.
1 + 3 + 3^2 ...+3^(n-1) = 3^n - 1/2 2012-01-27
Vicki pose la question :
I am trying to find out how to do show how this proof was worked.
Here is the end result 1 + 3 + 3^2 ...+3^(n-1) = 3^n - 1/2

This equation was used to find the number of white triangles in the Sierpinski Triangle

Walter Whiteley lui répond.
A geometric progression 2010-12-15
Abeth pose la question :
find the value of x so that 2(x-1), x+3, x will be a geometric progression.
Penny Nom lui répond.
The value after 30 years 2010-12-15
Abeth pose la question :
At the end of every year, the owners of a building which costs 2, 500, 000 pesos deducts 15% from its carrying value as estimated at the beginning of the year. find the estimated value at the end of 30 years.
Penny Nom lui répond.
A geometric progression 2010-04-30
Kalyani pose la question :
sum of infinite geometric progression is 9 and common ratio is 1/10 then sum up to 8 terms is?
Chris Fisher lui répond.
A geometric progression 2009-05-16
sweta pose la question :
find the ratio of GP if the first term is 1 and the sum of third and fifth term is 90.
Penny Nom lui répond.
Geometric sequences 2004-02-03
Alan pose la question :
hello, I am a junior in precalculus. we started working on geometric sequences today, it makes perfect sense on how it works. but why is it called that? if you could send me an answer to why geometric sequences have that name, I would be much appreciative.
Chris Fisher lui répond.
 
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