Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class

Ex 8.2

Ex 8.2, 1

Ex 8.2, 2

Ex 8.2, 3 Important

Ex 8.2, 4

Ex 8.2, 5 (a)

Ex 8.2, 5 (b) Important

Ex 8.2, 5 (c)

Ex 8.2, 6

Ex 8.2, 7 Important

Ex 8.2, 8

Ex 8.2, 9 Important

Ex 8.2, 10

Ex 8.2, 11 Important

Ex 8.2, 12

Ex 8.2, 13

Ex 8.2, 14 Important

Ex 8.2, 15

Ex 8.2, 16 Important

Ex 8.2, 17 Important

Ex 8.2, 18 Important

Ex 8.2, 19

Ex 8.2, 20

Ex 8.2, 21

Ex 8.2, 22 Important

Ex 8.2, 23 Important

Ex 8.2, 24 You are here

Ex 8.2, 25

Ex 8.2, 26 Important

Ex 8.2, 27 Important

Ex 8.2, 28

Ex 8.2, 29 Important

Ex 8.2, 30 Important

Ex 8.2, 31

Ex 8.2, 32 Important

Chapter 8 Class 11 Sequences and Series

Serial order wise

Last updated at May 29, 2023 by Teachoo

We need to show ratio of the sum of n terms of GP & sum of terms from (n + 1)th to 2nth term i.e. we need to calculate ( )/( ( + 1) (2 ) ) Putting values from (1) & (2) = (( a(1 ^ ))/((1 r)))/(( a)/((1 r))( ^ ^2 )" " ) = (( a(1 ^ ))/((1 r)))/(( a)/((1 r) ) ^ (1 ^ )" " ) = (( a(1 ^ ))/((1 r)))/ (( a(1 ^ ))/((1 r))) = ( a(1 ^ ))/(rn(1 ^ )) ( 1 r)/(1 r) Ex 8.2, 24 Show that the ratio of the sum of first n terms of a G.P. to the sum of terms from (n+1)th to (2n)th term is ( 1)/rn Ex 8.2, 24 Show that the ratio of the sum of first n terms of a G.P. to the sum of terms from (n+1)th to (2n)th term is ( 1)/rn We need to show ratio of the sum of n terms of GP & sum of terms from (n + 1)th to 2nth term i.e. we need to calculate ( )/( ( + 1) (2 ) ) Putting values from (1) & (2) = (( a(1 ^ ))/((1 r)))/(( a)/((1 r))( ^ ^2 )" " ) = (( a(1 ^ ))/((1 r)))/(( a)/((1 r) ) ^ (1 ^ )" " ) = (( a(1 ^ ))/((1 r)))/ (( a(1 ^ ))/((1 r))) = ( a(1 ^ ))/(rn(1 ^ )) ( 1 r)/(1 r) = 1/