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Example 8 - Chapter 7 Class 11 Permutations and Combinations (Term 2)
Last updated at March 22, 2023 by Teachoo
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Example 12 (i) Important
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Chapter 7 Class 11 Permutations and Combinations
Serial order wise
- Ex 7.1
- Ex 7.2
- Ex 7.3
- Ex 7.4
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- Miscellaneous
Transcript
Example 8 If 1/8! + 1/9! = ( 𝑥 )/10! , find x . 1/8! + 1/9! = 𝑥/10! 10! (1/8! " + " 1/9!) = x 10!/8! + 10!/9! = x (10 × 9 × 8!)/8! + (10 × 9!)/9! = x 10 × 9 + 10 = x 90 + 10 = x 100 = x Hence, x = 100
