How to calculate 2 / 12 × 14 + 2 / 14 × 16 + 2 / 16 × 18 + 2 / 18 × 20 + 1 / 20

=1/12-1/14+1/14-1/16+1/16-1/18+1/18-1/20+1/20
=1/12

RELATED INFORMATIONS

1. Negative 5,8,11,14,17,20... The nth number is
2. 5, 8, 11, 14, 17, 20. What is the 100th number and what is the nth number
3. 1/2*5+1/5*8+1/8*11+1/11*14+1/14*17
4. What are the rules of 3,7,15,31,63, (), 255?
5. Xiaoxiaojia's kitchen is 4 meters long and 3 meters wide. Now we are ready to lay floor tiles. There are two kinds of floor tiles. Which one is the most economical and how much?
6. The derivative y'of implicit function y = y (x) determined by equation y = 3x ln (x + y) + siny
7. There are two squares of the same size, 16 cm in length and 8 cm in width There are two squares of the same size, 16 cm in length and 8 cm in width. What is the perimeter and area of a square? What is the perimeter and area of a rectangle?
8. Given the function f (x) = 2cos [(Pie / 3) - (x / 2)], if x is between (- pie, pie), find the maximum and minimum of F (x)
9. As shown in the figure, a large rectangle is made up of seven identical small squares to know that the perimeter of the large rectangle is 34 cm Finding the length and width of a small rectangle
10. By the way, can 0 be radical?
11. -Simple calculation of 99 and 12 / 11 * (+ 7) -99 and 12 / 11 * (+ 7) This problem is simple, a rational number multiplication
12. The neighbors complained to the police about the noise of the shop
13. English translation It's a book called noisy neighbor
14. English translation It's full text translation. (sorry, there's no more)
15. Forever 17 years old
16. English translation Johnta Austin - 17 Minutes (Unreleased Rmx) Maximal r&b - The Freshest & Hottest R&B/ Hip-Hop Music! 17 minutes 17 minutes 17 minutes 17 minutes 17 minutes thats all its been, But it feels like a lifetime has passed me by The room keeps spinnin even though Im still sittin And my heart just caught fire And with every tear,the flames keep on growin And my soul is melting down Its been 17 minutes since my life started over without you (over without you) And my pride tries to lie,but my hearts too empty without you (empty without you) Dont want the world,just want the life That I had 18 minutes ago But all I got is 17 minutes Yeah all I got is 17 minutes 17 minutes,I keep pretending this is all a bad dream And you will be waiting,for me to wake up So we can get back to the business of you loving me But Im afraid it aint so,and Im here alone And this is my reality Its been 17 minutes since my life started over without you (over without you) And my pride tries to lie,but my hearts too empty without you (empty without you) Dont want the world,just want the life That I had 18 minutes ago But all I got is 17 minutes,and thats all my eyes can see 17 minutes,the clock keeps ticking without you 17 minutes,life is getting away from me 17 minutes,how will I feel the 16,15,14,13 Its been 17 minutes since my life started over without you (over without you) And my pride tries to lie,but my hearts too empty without you (empty without you) Dont want the world,just want the life That I had 18 minutes ago But all I got is 17 minutes Yeah all I got is 17 minutes (Oooh) But all I got is 17 minutes
17. English translation I finished my cooking course in a college at the age of 21.I thought I was going to become a world famous cook.I hoped people would travel from all over the world just to get a taste of my food.But three months later,I knew I was wrong .Since nobody was traveling to taste my food,I decided I should travel to taste theirs. during my travel,I visited many different countries,such as Japan and France,where different kinds of food opened my eyes.I especially loved the experienced in Italy and China.
18. English (12 19:47:27) No matter how far my mother has to go, she doesn't care It feels hard It smells disgusting It tastes delicious deterioration It's getting dirtier and dirtier verify reality My English
19. Fill in the blanks with English Prepositions (17 21:14:0) It's easier to climb up the hill than to climb ____ the hill My mother asks me ____ my life in Canada in her letter
20. Fill in prepositions in English (30 19:23:17) We have a ten-minute break-------------classes