Question

sum of 6 terms of an arithmetic sequence is 340 and the 6th term is 90 find the sequence.​

Answer 1

Answer:

Suppose a sequence of numbers is arithmetic (that is, it increases or decreases by a constant amount each term), and you want to find the sum of the first n terms.

Denote this partial sum by Sn . Then

Sn=n(a1 + an)2 ,

where n is the number of terms, a1 is the first term and an is the last term.

The sum of the first n terms of an arithmetic sequence is called an arithmetic series .

Answer 2

Answer:

(please check your question)

Step-by-step explanation:

given, in an A.P, S₆ = 340 and t₆ = 90

Sₙ = ($\frac{n}{2}$)[a+l)

here, 340 = ($\frac{6}{2}$)*(a+90)

=> 340 = 3(a+90)

=> 340 = 3a + 270

=> 3a = 340-270 = 70

=> a = 70/3 here you cant get a fraction

(please check your question)