RD SHARMA Solutions for Class 11-science Maths Chapter 20 - Geometric Progressions
Chapter 20 - Geometric Progressions Exercise Ex. 20.1

Chapter 20 - Geometric Progressions Exercise Ex. 20.2


Chapter 20 - Geometric Progressions Exercise Ex. 20.3


Find the sum of the geom etric series:
1, -a, a2, - a3 , ..... to n terms (a ≠ 1)






A person has 2 parents, 4 grandparents, 8 great grand parents, and so on. Find the number his ancestors during the ten generations preceding his own.
(n - 1) Sn = 1n + 2n + 3n + ....+ nn
Chapter 20 - Geometric Progressions Exercise Ex. 20.4




Chapter 20 - Geometric Progressions Exercise Ex. 20.5
If the 4th, 10th, and 16th terms of a G.P. are x, y, and z respectively. Prove that x, y, z are in G.P.
If pth, qth, and rth terms of an A.P. and G.P. are both a, b, and c respectively, show that ab-c bc-a ca-b = 1.
Chapter 20 - Geometric Progressions Exercise Ex. 20.6
Chapter 20 - Geometric Progressions Exercise Ex. 20VSAQ
If (p + q)th and (p - q)th terms of a G.P. are m and n respectively, then write its pth term.
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