Question

Which expression defines the arithmetic series 1+3+5+... for seven terms

Answer 1

1+3+5+7+9+11+13+15+17+19 is the answer. Hopefully this helped!! :)

Answer 2

Answer: The expression for arithmetic series for seven terms is given by

`\sum_(n=1)^(n=7)(2n-1)`

Explanation:

Since we have given that

1+3+5+..................

Here, a = 1

d= common difference = a₂-a₁=3-1=2

n = 7

We need to write the arithmetic series for seven terms:

`\sum_(n=1)^(n=7)(2n-1)`

Hence, the expression for arithmetic series for seven terms is given by

`\sum_(n=1)^(n=7)(2n-1)`