1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Maslowich
3 years ago
12

If the nth partial sum of the sequence an is given by

Mathematics
1 answer:
Art [367]3 years ago
6 0

This is an example of a series in arithmetic progression.

The nth term an can be calculated using the formula:

an = a1 + (n – 1) d

<span>where: a1 = is the 1st term of the series</span>

d = common difference

<span>Calculating for the 1st term:</span>

a1 = 2k + 4 = 2 (1) + 4 = 6

Calculating for the common difference by :

d = a2 – a1

d = 2 (2) + 4 – 6

d = 2

 

Therefore calculating for an:

an = 6 + (n – 1) 2

an = 6 + 2n -2

an = 2n + 4

Therefore the answer is B. 2n+4

<span> </span>

You might be interested in
The price of an item was reduced by 10% and then by 20%. Is that the same as reducing the price by 30%? If not, then what percen
Natasha2012 [34]

Answer:

28%

Step-by-step explanation:

Hello,

When the item is reduced by 10%, this is like we multiply this price by 1-0.10=0.90

When the item is reduced by 20%, this is like we multiply this price by 1-0.20=0.80

When the item is reduced by 10% and then by 20%, this is like we multiply this price by 0.90*0.80=0.72

so this is equivalent that the item is reduced by 28% (as 1-0.28=0.72)

hope this helps

8 0
3 years ago
Help PLZ <br> plz tell me which should i choose.
Alex_Xolod [135]

Answer:

4

Step-by-step explanation:

If Log a×=16diameter then value of log =4

3 0
3 years ago
What is the value of cos ø in the diagram below?<br> A. 3/5<br> B. 3/4<br> C. 4/5<br> D. 4/3
bazaltina [42]

Answer: The answer is A. 3/5

Step-by-step explanation:

Cos is the X coordinate given in parenthesis.

The X coordinate is 0.6, so find the fraction which equals 0.6.

3/5 = 0.6

3 0
3 years ago
Given that Triangle ABC ~ DEF, solve for X.​
Vadim26 [7]

Answer:

x = 7

Step-by-step explanation:

if ABC ~ DEF than AB ~ ED, AC ~ DF, and CB ~ FE

The ratio of AB to ED is given as 5/30 = 1/6

For AC ~ ED the ratio would be same x/42 = 1/6 cross multiply it

6x = 42

x = 7

6 0
3 years ago
What is the mode for the following set of data? 2, 5, 7, 8, 11, 11, 12
aleksley [76]
Mode = 11

Reason: 11 appeared twice, which is the most frequent number observed in this set of data.
8 0
4 years ago
Other questions:
  • A parallelogram has sides lengths of 7inches and 11inches find the perimeter
    5·2 answers
  • Ibigay ang kwentong bayan​
    8·1 answer
  • Find the value of the variable and GH if H is between G and I. <br> GI = 5b + 2, HI = 4b – 5, HI = 3
    14·1 answer
  • Find the area of the following shapes:
    5·1 answer
  • What is the slope of y = - 1 + 3x
    8·1 answer
  • Your parents ask you to go to the grocery store to purchase some last minute items for dinner. You purchase a head of lettuce fo
    7·1 answer
  • Find the value of x in the triangle shown below.<br> a. x=21<br> b. x=42<br> c. x= 15<br> d. x=21
    14·2 answers
  • The illustration below shows the graph of y as a function of x.
    12·1 answer
  • Two numbers x and y, have a sum of 23 and a difference of 7. x is greater than y
    15·2 answers
  • An oil tanker is leaking at a constant rate per minute. After 12 minutes, 537 gallons of oil remain in the tanker. After 16 minu
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!