Posted by bogoss on Saturday, March 12, 2011 at 1:52pm.
1) If the number 1,1/3,1/9, are terms of Geometric progression. Find its common ratio
2) If the second term of Geometric progression is equal to 3, and the 5th term is equal to 81/8. Find the 7th term.
3)If x,y,3 is a Geometric progression. Find the value of x and y
4) Insert 4 numbers between 128 and 4 to form a Geometric progression
5) The average maximum temperature in Cairo town in 1999 was 40 degree C in June, 30 degree C in July, 25.6 degree C in August and it is continue to decrease in the same manner during the following months. what will the average maximum temperature of Cairo be in February 2000 AD {(0.8)to the power of eight 0.168)

math  Reiny, Saturday, March 12, 2011 at 2:32pm
1.
r = 2nd/1st or 3rd/2nd
= (1/3) / 1 or (1/9) / (1/3)
= 1/3 for both
2.
ar = 3
ar^4 = 81/8
divide the second equation by the first
r^3 = 27/8
r = 3/2
take it from there
3. to be a GS
y/x = 3/y
y^2 = 3x
that's all you can do, unless you know either x or y
4.
128 , 128r , 128r^2 , 128r^3 , 128r^4 , 4
then 128r/128 = 4/(128r^4)
solve for r
5. you try it, it's easy.

math  Anonymous, Monday, March 12, 2012 at 9:59am
giyfif

math  Anonymous, Sunday, January 26, 2014 at 5:14pm
The numbers 27;x;y are in geometric progression if the sum of these numbers is 21 calculate the possible value of x and y
Answer This Question
Related Questions
 math C2 sequences and series  The eight,fourth and second terms of an ...
 Geometric progression  The second term of a geometric progression is 12 more ...
 Maths  1..The first 2 terms of a geometric progression are the same as the ...
 math  If the sum of the first and the second terms of an infinite Geometric ...
 geometric progression  the 3rd term of a gpis 10 and the 6th term is 80 find ...
 Math Algebra  The first term of a geometric progression is more than the third ...
 MATHEMATIC DEPARTMENT  The second, third and ninth terms of an arithmetic ...
 uniuyo  The second and fifth term of a geometric progression are 21 and 567 ...
 Advanced algebra  Find the 7th term of geometric progression if the second term...
 Geometric progression  The first term of an infinite geometric progression is 1...
More Related Questions