#### Question

For the following arithmetic progressions write the first term *a* and the common difference* d:*

−1.1, −3.1, −5.1, −7.1, ...

#### Solution

In the given problem, we need to write the first term (*a*) and the common difference (*d*) of the given A.P

−1.1, −3.1, −5.1, −7.1...

Here, the first term of the given A.P is (*a*) = −1.1

Now, we will find the difference between the two terms of the given A.P

`a_2 - a_1 = -3.1 - (-1.1)`

`a_2 - a_1 = -2`

Similary

`a_3 - a_2 = -5.1 - (-3.1)`

`a_3 - a_2 = -2`

Also

`a_4 - a_3 = -7.1 - (-5.1)`

`a_4 - a_3 = -2`

As `a_2 - a_1 = a_3 - a_2 = a_4 - a_3 = -2`

Therefore the fist term A.P is a = -1.1 and the common difference is `d = -2`

Is there an error in this question or solution?

#### APPEARS IN

Solution For the Following Arithmetic Progressions Write the First Term A And the Common Difference D: −1.1, −3.1, −5.1, −7.1, ... Concept: Arithmetic Progression.