Question

nth term of the arithmetic sequence of 19,25,31​

Answer 1

Answer:

Arithmetic sequences. Calculator Icon ... Your input 19,25,31,37,43,49,55 appears to be an arithmetic sequence ... an=55 (this is the last/n th member) d=6 (this is the ... Terms and topics.

Step-by-step explanation:

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Answer 2

The sum of the members of a finite arithmetic progression is called an arithmetic series.

Using our example, consider the sum:-

19+25+31

This sum can be found quickly by taking the number n of terms being added (here 7), multiplying by the sum of the first and last number in the progression (here 19 + 31 =50),and dividing by 2:

n(a1+an)/2

7(19+50)/2

The sum of the 7 members of this series is 241.5

Your input 19,25,31appears to be an arithmetic sequence

a1 =a1+(n-1)*d =19+(1-1)*6 =19

a2 =a1+(n-1)*d =19+(2-1)*6 =25

a3 =a1+(n-1)*d =19+(3-1)*6 =31

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