aguzman aguzman

03-07-2015
Mathematics

contestada

the sum of the first 30 terms of the sequence an=6n+5 is

Respuesta :

kimeto3 kimeto3

03-07-2015

Sum= n(a₁+an)/2 where a₁ is the first term, and an is the nth term(30th for this)
an= 6n+5
a₁=6(1)+5
=11
a₃₀=6(30)+5
=185
Sum= 30(11+185)/2
=15(196)
=2940

Answer Link

Otras preguntas

The nurse is assisting with conscious sedation for a 6-year-old undergoing a bone marrow biopsy. The nurse's most important responsibility during the procedure

a bag contains 42 cups of dog food. your dog eats 2 1 3 cups of dog food each day how many days does the bag of dog food last

When we speak of the flavor of a word, we're talking about the extra understood meanings that it carries in addition to its main meaning. These extra meanings

For someone learning English, why might English idiomatic expressions be difficult to understand?

The tendency for an object in motion to remain in motion is called orbital speed. True or false

The moons gravity affects the earths what and what levels,it pulls on the water causing the changes in tides

Which expression is equivalent to −2.6+(−2.9)+(−7.1) ?

Which two fields of study to the principles of biomechanics come from

Which of these gymnosperms are known to be important in maintaining the balance of carbon in an ecosystem? A.garden flowering plants B.ferns and liverworts C.mo

A truck whose bed is 2.5 m long, 1.5 m wide, and 1.0 m high is delivering sand for a sand sculpture competition. About how many trips of Sand must the driver ma