NCERT Class X Chapter 5: Arithmetic Progression Exercise 5.1 Question 2 (i)

Question:

Write first four terms of the AP, when the first term a and the common difference d are given as follows: a = 10,d = 10.

Given:

First term (a) = 10
Common difference (d) = 10

To Find:

First four terms of the AP

Formula:

n^th term of an AP = a + (n-1)d

Solution:

First term (a₁) = a = 10

Second term (a₂) = a + d = 10 + 10 = 20

Third term (a₃) = a + 2d = 10 + 2(10) = 30

Fourth term (a₄) = a + 3d = 10 + 3(10) = 40

Result:

The first four terms of the AP are 10, 20, 30, 40.

Next question solution:

NCERT Class X Chapter 5: Arithmetic Progression Exercise 5.1 Question 2 (ii).

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