anthonypeoples23 anthonypeoples23
  • 23-01-2020
  • Mathematics
contestada

What is the sum of the 7th and 15th term of the arithmetic sequence 2, 8, 14, ... ?

Respuesta :

azharfreelance174
azharfreelance174 azharfreelance174
  • 26-01-2020

Answer:

Step-by-step explanation:

If we look at sequence,

a1=2   and    a2=8

So,

d=a2-a1=8-2=6

And we know the formula for arithmetic sequence is

[tex]a_n=a_1+(n-1)*d[/tex]

hence 7th term would be     a_7=2+(7-1)*6=> [tex]a_7=38[/tex]

and a_15=2+(15-1)*6=>  [tex]a_1_5=86[/tex]

Answer Link

Otras preguntas

A carbon-12 atom has a mass of 12.00000 amu. The mass of a proton is 1.00728 amu, and the mass of a neutron is 1.00866 amu. How many protons does the carbon-1
What grammatical structure is the italicized portion of the sentence? Although her personality had not changed at all, Megan looked quite different. adverb clau
Which aspect of this excerpt from Christina Rossetti's poem "Remember" would the imagists have disliked?
A Sentence with climate(The first word must be The)
Barbara can walk 3200 meters in 24 mins. How far can she walk in 3mins. ?
what major event happened in the United States on September 11, 2001?
Historical events that lead up to the army jrotc
Why is money called money
the width of a rectangle is 33 centimeters. the perimeter is atleast 776 centimeters. write and solve an inequality to find the possible lengths of the rectangl
what is the name of the area on the side of the mountains away from the wind that receives little rainfall ??? A dry spell B no mans land C tundra D rain sha