Three numbers are known to form an arithmetic sequence, their sum is 12, and their product is 60
3 4 5
I know this mental arithmetic
RELATED INFORMATIONS
- 1. It is known that 1 of a, 1 of B and 1 of C are equal difference sequence. It is proved that B + C of a, a + C of B and a + B of C are equal difference sequence
- 2. Three numbers are known to form an arithmetic sequence. Their sum is 18 and their sum of squares is 126. Find these three numbers
- 3. The sum of the three numbers is equal to 15 and the sum of the squares is equal to 83
- 4. If three numbers form an arithmetic sequence, the sum is 15 and the sum of squares is 83, find the three numbers
- 5. The sum of three numbers is 15 and the sum of their squares is 83
- 6. It is known that three numbers form an arithmetic sequence, the sum of which is equal to 15 and the sum of squares is equal to 107
- 7. If the sixth term of an arithmetic sequence is 5 and the sum of the third term and the eighth term is 5, then the fifth term of the arithmetic sequence is 5
- 8. It is known that the third term of the arithmetic sequence [an] is 5, the eighth term is 20, and the 25th term? N is written at the bottom right of a!
- 9. If the sixth term of an arithmetic sequence is 5 and the sum of the third term and the eighth term is 5, then the sum of the first nine terms of the arithmetic sequence is 5______ .
- 10. Known arithmetic sequence 2,5,8,11. Which term is 599?
- 11. Four numbers are known to form an arithmetic sequence, their sum is 36 and their product is 5760
- 12. In the arithmetic sequence 3, 12, 21, 30, 39, 48 912 is the second______ The number of them
- 13. Three numbers are known to be equal difference sequence, and their sum is 12 and product is 60
- 14. Given the arithmetic sequence of three numbers, the sum of which is 12 and the product is 60, we can find these three numbers
- 15. Three real numbers form an arithmetic sequence, and their sum is 12, and their product is 48
- 16. There are eight numbers, and their average is 7.5. It is known that the average of the first five numbers is 8.8, and the average of the last four numbers is 9.5. What is the fifth number?
- 17. There are eight numbers whose average is 9.2. The average of the first four numbers is 8.9, and the average of the last five numbers is 9.5. What is the fourth number? What's the formula
- 18. If the sixth term of an arithmetic sequence is 5 and the sum of the third term and the eighth term is 5, then the sum of the first nine terms of the arithmetic sequence is 5______ .
- 19. Given that the average of 8 numbers is 5, what is the average of 9 numbers composed of 8 numbers and 5 numbers?
- 20. The following string number: 2.5.8.212, find the average of this string number