Question

the algebraic form of arithmetic sequence is 8n+7 .find the sum of first 30 terms of this sequence

Answer 1

Step-by-step explanation:

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)

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Answer 2

[a] what is the first term of the sequence. We know that if a sequence is given by {an=f(n)}, then the first term of the sequence is determined by putting n = 1 in the formula for the general term of the sequence, i.e. a=f(1). ...

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