Question

The algebraic form of an arithmetic sequence is 2n+1 .

a) What is the common difference of this sequence ?

b) What is the sum of first 9 terms of this sequence ?

c) What is the algebraic form of the sum of this sequence ?​

Answer 1

Answer:

Given, arithmetic sequence X

n

=5n+3

a. The first term of the sequence, put n=1

X

1

=5×1+3=8

b. d=5 (coefficient of n be the common difference)

The remainder divide by 5=3.

(

5

8

=3,

5

13

=3,

5

18

=3,etc)

Answer 2

Answer:

Given, arithmetic sequence X

n=5n+3

a. The first term of the sequence, put n=1

X1=5×1+3=8

b. d=5 (coefficient of n be the common difference)

The remainder divide by 5=3.

(5 8 =3,5 13 =3,5 18 =3,etc)

Step-by-step explanation: