Advertisements
Advertisements
प्रश्न
Find x if `1/(6!) + 1/(7!) = x/(8!)`
Advertisements
उत्तर
Given that `1/(6!) + 1/(7!) = x/(8!)`
`1/(6!) + 1/(7*6!) = x/(8*7*6!)`
Cancelling all 6! we get
`1/1 + 1/7 = x/(8 xx 7)`
`(7 + 1)/7 = x/(8 xx 7)`
`8/7 = x/(8 xx 7)`
x = `8/7 xx 7 xx 8` = 64
APPEARS IN
संबंधित प्रश्न
Find r if `""^5P_r = 2^6 P_(r-1)`
Evaluate each of the following:
8P3
Write the number of all possible words that can be formed using the letters of the word 'MATHEMATICS'.
The number of different ways in which 8 persons can stand in a row so that between two particular persons A and B there are always two persons, is
The possible outcomes when a coin is tossed five times:
Suppose 8 people enter an event in a swimming meet. In how many ways could the gold, silver and bronze prizes be awarded?
Choose the correct alternative:
The product of r consecutive positive integers is divisible b
The number of different words that can be formed from the letters of the word INTERMEDIATE such that two vowels never come together is ______.
The number of three-digit even numbers, formed by the digits 0, 1, 3, 4, 6, 7 if the repetition of digits is not allowed, is ______.
Number of words from the letters of the words BHARAT in which B and H will never come together is ______.
