There is a fractional sequence: 2 / 1,3 / 2,5 / 3,8 / 5,13 / 8,21 / 13 ··············································································
F(n) = (1/2)*((sqrt(5)+1)^(n+2)-(1-sqrt(5))^(n+2))/((sqrt(5)+1)^(n+1)-(1-sqrt(5))^(n+1))
RELATED INFORMATIONS
- 1. Bend a rectangle with 16cm long wire and an isosceles triangle with 5cm waist length with 18cm long wire. If the area of the rectangle is equal to that of the isosceles triangle, the side length of the rectangle is______ cm.
- 2. Use 18cm iron wire to form a rectangle. If the length is 5cm, how many cm is the width
- 3. Bend a rectangle with 16cm long wire and an isosceles triangle with 5cm waist length with 18cm long wire. If the area of the rectangle is equal to that of the isosceles triangle, the side length of the rectangle is______ cm.
- 4. Bend a rectangle with 16cm long wire and an isosceles triangle with 5cm waist length with 18cm long wire. If the area of the rectangle is equal to that of the isosceles triangle, the side length of the rectangle is______ cm.
- 5. A 60cm long wire is used to form a rectangular area (1) If the width of the rectangle is 2 / 3 of the length, what is the area of the rectangle? (2) If the width of the rectangle is 4cm less than the length, what is the area of the rectangle? (3) If the enclosure is a square, what is the area of the square? (4) Comparing the area relations in (1) (2) (3), what rules can you conclude?
- 6. Use a 50cm long wire to form a rectangle. If the length and width are prime numbers, its area is () cm2
- 7. A 76cm long wire is surrounded into a rectangle, and the length is 5cm more than twice of the width
- 8. A section of iron wire is enclosed into a rectangle with an area of 150 cubic meters, and its length is 5cm longer than its width?
- 9. Use a 48CM long wire to form a rectangle. The rectangle is 5cm long and 4cm wide. What's its height
- 10. Use a 54 cm long wire to form a rectangle. If the length is twice the width, what is the length and width of the rectangle? What's the area?
- 11. Fill in 3, 6, 9, 12, 15, 18, 21, 24, 27 in the appropriate box, so that the sum of the three numbers in each horizontal, vertical, and oblique row is 45
- 12. 1.(+7)+(+3) 2.(+7)+(-3) 3.(+7)+(-7)
- 13. Simple calculation of 135 * 852852-852 * 135135
- 14. There are 230 tons of grain in the two granaries. Later, 50 tons are transported out of granary a, and 20 tons are transported into granary B. at this time, the grain in granary B is three times as much as that in granary a, and how much is there in each granary A and B
- 15. 1. Master Liu used to take 10 minutes to process a part, but now it is less. 2. How many hours does it take to process a part in one hour? 2
- 16. 5 / 6 of a is equal to 3 / 4 of B. what is the ratio of a to B?
- 17. If the ratio of a to B is 5 to 6, how much less is a than B?
- 18. The ratio of number a to number B is 3:5, and the ratio of number B to number C is 4:7. Then the ratio of number a to number C is (:)
- 19. There are 325 boys and girls in a grade. In the new school year, there are 25 boys and 5 girls, and the total number is increased by 16 A. 160B. 170C. 180D. 190
- 20. In a workshop, the number of male workers is two fifths more than that of female workers, and the number of female workers is less than that of male workers?