express the answer as a common fraction.
2007-02-04 03:02:51 · 5 answers · asked by akdh;flkasjd;lfkj; 1 in Science & Mathematics ➔ Mathematics
First three primes are 2,3,5.
Their sum is 2+3+5=10
The sum of recips is: 1/2 + 1/3+ 1/5= 15/30 + 10/30 + 6/30= 31/30
The product of the sum and sum of recips is:
10* 31/30 = 31/3 = 10 1/3
Done.
2007-02-04 03:23:58 · answer #1 · answered by Jerry P 6 · 1⤊ 0⤋
The sum of the first 3 primes is 2 + 3 + 5 = 10
The sum of the reciprocals of the first 3 primes
is 1/2 + 1/3 + 1/5 = 5/6 + 1/5 = 31/30.
The product is 10Ã31/30 = 31/3.
2007-02-04 11:50:10 · answer #2 · answered by steiner1745 7 · 0⤊ 0⤋
For one thing, the first three primes are 2, 3, and 5.
The sum of the first three primes would be
2 + 3 + 5 = 10
The sums of the reciprocals of the first three primes would be
1/2 + 1/3 + 1/5 = 15/30 + 10/30 + 6/30 = 31/30
The product of these two values would be
10(31/30) = 31/3
2007-02-04 11:12:07 · answer #3 · answered by Puggy 7 · 1⤊ 0⤋
1 is not considered a prime number.
a. sum of first 3 prime nos,
2+3+5=10
b. sum of reciprocals of first 3 prime nos,
1/2 + 1/3 + 1/5 = (15 + 10 + 6)/30 = 31/30
c. Therefore the product of both sums,
10 x 31/30 = 31/3 = 10 1/3.
2007-02-04 11:13:48 · answer #4 · answered by kanlim 3 · 1⤊ 0⤋
1 1/30
2007-02-04 11:18:38 · answer #5 · answered by Just Been Jogging 1 · 0⤊ 1⤋