Question

1. The list of numbers -8,-5, -2, 1......... is:
) Not an A.P.
(ii) An A.P. with d = 3
ii) An A. P. with d = -3
(iv) An A.P. with d = –13​

Answer 1

Answer:

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Step-by-step explanation:

(2) An A.P. with d = 3

Answer 2

Solution:

Sequence => -8, -5, -2, 1.........

An AP(Arithmetic Progression) is having a sequence of numbers which is having a constant difference from the previous quantity.

Difference means second minus the first.

Let's see the difference between each term in AP,

-8, -5, -2, 1.........

Difference between =>

-5 - (-8) = 3

-2 - (-5) = 3

1 - (-2) = 3 and so on.

(ii) An A. P. with d = 3 is the correct answer.

The difference between each term is of 3.

Extra Information:

To know the particular place term in AP use this formula,

aₙ = a₁ + (n-1)d

To know the sum of series of particular range in AP,

Sₙ = n(a₁ + aₙ)/2

a₁ means the first term.

aₙ means last term.