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20. Geometric Progressions
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Q14 of 176 Page 21

Mark the correct alternative in each of the following:

If a, b, c are in G.P. and x, y are AM’s between a, b and b, c respectively, then


a,b,c are in GP


∴ b2 = a.c also c =ar2


Where r is the common ratio


a,x,b,y,c are in AP








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All 176 →
12

Mark the correct alternative in each of the following:

The nth term of a G.P. is 128 and the sum of its n terms is 225. If its common ratio is 2, then its first term is


13

Mark the correct alternative in each of the following:

If second term of a G.P. is 2 and the sum of its infinite terms is 8, then its first term is


15

Mark the correct alternative in each of the following:

If A be one A.M. and p, q be two G.M.’s between two numbers, then 2 A is equal to


16

Mark the correct alternative in each of the following:

If p, q be two A.M.’s and G be one G.M. between two numbers, then


Questions · 176
20. Geometric Progressions
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