SELINA Solutions for Class 10 Maths Chapter 11 - Geometric Progression

Chapter 11 - Geometric Progression Exercise Ex. 11(A)

Solution 1(i)

Solution 1(ii)

Solution 1(iii)

Solution 2

Solution 3

Solution 4

Solution 5

Solution 6

Solution 7

Solution 8

Solution 9

Solution 10

Solution 11

Solution 12

Given series: 2, - 6, 18, - 54 ……

Chapter 11 - Geometric Progression Exercise Ex. 11(B)

Solution 1

Solution 2

Solution 3

Solution 4

Solution 5

Solution 6

Solution 7

Solution 8

Solution 9

Solution 10

Chapter 11 - Geometric Progression Exercise Ex. 11(C)

Solution 1

Solution 2

Solution 3

Solution 4

Solution 5

Solution 6

Solution 7

Solution 8(i)

Solution 8(ii)

Solution 9

Chapter 11 - Geometric Progression Exercise Ex. 11(D)

Solution 1(i)

Solution 1(ii)

Solution 1(iii)

Solution 1(iv)

Solution 1(v)

Solution 1(vi)

Solution 2

Solution 3

Solution 4

Solution 5

Solution 6

Solution 7

Solution 8

Solution 9

Solution 10

Solution 11

Solution 12(i)

 

Solution 12(ii)

Solution 12(iii)

Solution 13

Solution 14

Solution 15

First term (a) =   

  

Solution 16

First term (a) = 125 

  

Solution 17

  

Thus, the given sequence is a G.P. with   

  

Solution 18

  

Solution 19

Let the five terms of the given G.P. be

  

Given, sum of first two terms = -4

  

And, 5th term = 4(3rd term)

ar2 = 4(a)

r2 = 4

r = ±2

When r = +2,

  

When r = -2,