Question

Is the sequence arithmetic? (Yes or no) If yes, please also give its common difference. 14) -2.8, -2.2, -1.6, -1.0

Answer 1

Yes

Explanation:

-2.8, -2.2, -1.6, -1.0

-2.2-(-2.8)= -1.6 - (-2.2)= -1 - (-1.6)= 0.6

This is AP with first term -2.8 and common difference 0.6

Answer 2

Yes

The common difference is .6

Explanation:

Take the second term and subtract the first term

-2.2 - (-2.8)

-2.2+ 2.8 = .6

Take the third term and subtract the second

-1.6 - (-2.2)

1.6 +2.2

The common difference is .6