Question

The first term a and common difference d are given. Find the first four terms of the A.P.

a = - 1, d =1/-2​

Answer 1

Answer:

Given, a=−2 and d=0

The general form of an A.P is a,a+d,a+2d,a+3d,...

So,the first term a is −2 and the common difference d is 0,

then the first four terms of the AP is

−2,(−2+0),(−2+2×0),(−2+3×0)

⇒−2,−2,−2,−2

Hence, the first four terms of the A.P. is −2,−2,−2 and−2.

Step-by-step explanation:

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Answer 2

Answer:

The four terms are:

-1, -3/2 , -2 , -5/2,..

Step-by-step explanation:

a = -1 , d = -1/2

a2 = a + d

     = -1 - 1/2

     = (-2-1)/2

     = -3/2

a3 = a + 2d

    -1 + 2 x -1/2

    = -1 + (-1)

   = -1 - 1

  = -2

a4 = a + 3d

     = -1 + 3 (-1/2)

      = -1 -3/2

      = (-2 -3)/2

      = -5/2