aalbersonne
aalbersonne aalbersonne
  • 21-07-2016
  • Mathematics
contestada

find the sum of the sequence 36 37 38 39 ... 109=

Respuesta :

dalendrk
dalendrk dalendrk
  • 24-07-2016
It's an arithmetic sequence:

[tex]a_1=36;\ a_2=37;\ a_3=38;\ ...\ ;\ a_{74}=109\\\\S_n=\dfrac{a_1+a_n}{2}\cdot n\\\\a_1=36;\ n=74;\ a_{74}=109\\\\S_{74}=\dfrac{36+109}{2}\cdot74=\dfrac{145}{2}\cdot74=72.5\cdot74=5365[/tex]
Answer Link

Otras preguntas

Earthquakes can _______. a. trigger other earthquakes b. cause tsunami c. cause billions of dollars in damages d. all of the above
one of the Patriots greatest strengths was there
eight friends share 12 burritos equally.how many burritos does each friend get?
Tom caught a fish that weighed 2/3 pound. Kira caught a fish that weighed 7/8 pound. Whose fish weighed more?
During the winter, what type of precipitation would most likely fall in New York, with temperatures averaging 32 F? rain sleet snow drizzle
Chamber ensembles are _____ than orchestras. larger smaller more popular less accomplished
If the earth’s average surface temperature continues to change over the next 30 years at the same rate it changed between 1980 and 2010, the average temperature
Your brother has $2000 saved for vacation his airplane ticket is $637 Write and solve an inequality to find out how much he can spend for everything else.
a bag of 8 apples cost $2.88. What is the cost of one apple
anna bakes 12 blueberry muffins, 20 bran muffins, and 8 apple muffins. what percent of the muffins are blueberry?