subject
Mathematics, 07.04.2020 16:01 loanyst7513

A positive integer n is perfect if and only if the sum of its divisors is equal to 2n (including the number n itself). Prove that if a natural number is perfect, then the sum of the reciprocals of all its divisors (including n) is 2.

ansver
Answers: 1

Another question on Mathematics

question
Mathematics, 21.06.2019 14:30
An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and have recorded the color rolled for each toss. what is the probability you will roll a brown on your next toss of the die? express your answer as a simplified fraction or a decimal rounded to four decimal places.
Answers: 2
question
Mathematics, 21.06.2019 14:30
Christine went shopping and bought each of her six six nephews a? gift, either a video costing? $14.95 or a cd costing? $16.88. she spent ? $ 97.42 97.42 on the gifts. how many videos and how many cds did she? buy?
Answers: 1
question
Mathematics, 21.06.2019 15:20
(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100
Answers: 1
question
Mathematics, 22.06.2019 00:00
Which of the following is the maximum value of the equation y=-x^2+2x+5 a. 5 b. 6 c. 2. d. 1
Answers: 1
You know the right answer?
A positive integer n is perfect if and only if the sum of its divisors is equal to 2n (including the...
Questions
question
Mathematics, 14.12.2021 01:30
question
Mathematics, 14.12.2021 01:30
question
Mathematics, 14.12.2021 01:30