Question

First four terms of A.P. are.......... whose a =-3, d = 4:

Answer 1

Answer:

The first four terms of the A.P. are -3, 1, 5, 9.

Step-by-step explanation:

Given A.P.

a = -3

d = 4

We know,

aₓ = a + (x-1) d

∴ a₁ = -3

  a₂ = -3 + (2-1) 4 = -3 + (1) 4 = 1

  a₃ = -3 + (3-1) 4 = -3 + (2) 4 = -3 + 8 = 5

  a₄ = -3 + (4-1) 4 = -3 + (3) 4 = -3 + 12 = 9.

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Hope it helps!

Answer 2

Answer:

First four terms of this A.P. will be – 2, – 2, – 2 and – 2. (iii) Given:a = 4, d = – 3Let the series be a1, a2, a3, a4 … the series will be 4, 1, – 2 – 5 … First four terms of this A.P. will be 4, 1, – 2 and – 5.