Question

For the AP : 1.5, 0.5, –0.5, -1.5 , . . ., write the first term a and the common difference d.​

Answer 1

Answer:

(A,D)=(1.5,1)

Step-by-step explanation:

a=1.5

d=0.5-1.5=-1

Answer 2

Given,

• The AP: 1.5, 0.5, -0.5, -1.5,______ is given.

To find,

• The first term of the AP 'a'
• Common difference 'd'

Solution,

For the AP: 1.5, 0.5, –0.5, -1.5,____  the first term 'a' is 1.5 and the common difference 'd' is -1.

We can simply find the first term of the AP 'a' as the first term of the AP is the term at the first position from where the AP series begins,

In the given AP series the first term 'a' = 1.5

Now, common difference 'd' is the difference between any two consecutive terms of the AP and it is the same in succeeding terms,

                       d = a₂-a₁

                           = 0.5 -1.5

                       d  = -1

Hence, For the AP: 1.5, 0.5, –0.5, -1.5,____  the first term 'a' is 1.5 and the common difference 'd' is -1.