Examples

Example 1 (i)

Example 1 (ii)

Example 2

Example 3 Important

Example 4

Example 5 Important

Example 6

Example 7 Important

Example 8

Example 9 Important

Example 10 Important

Example 11

Example 12 Important

Example 13 Important You are here

Example 14

Question 1

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Question 3 Important

Question 4

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Question 10 Important

Chapter 8 Class 11 Sequences and Series

Serial order wise

Last updated at April 16, 2024 by Teachoo

Example 13 If A.M. and G.M. of two positive numbers a and b are 10 and 8, respectively, find the numbers. Now we have a + b = 20 (1) ab = 64 (2) From (2) ab = 64 a = 64/ Putting a = 64/ in (1) a + b = 20 64/ + b = 20 (64 + 2)/ = 20 64 + b2 = 20b b2 20b + 64 = 0 b(b 16) 4(b 16) = 0 (b 4)(b 16) = 0 b 4 = 0 or b 16 = 0 b = 4 or b = 16 Hence the numbers are a = 4, b = 16 or b = 4, a = 16