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

The expression for arithmetic series for seven terms is given by

Step-by-step 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:

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

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation: