Question 2 (i)
Write first four terms of the A.P. when the first term "a" and the common difference "d" are given as follows.
(i) a = 10, d = 10

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Solution

$G i v e n, a = 10 a n d d = 10$
Let the group of numbers be $a_{1}, a_{2}, a_{3}, a_{4}, a_{5}, \dots$
$a_{1} = a = 10 a_{2} = a_{1} + d = 10 + 10 = 20 a_{3} = a_{2} + d = 20 + 10 = 30 a_{4} = a_{3} + d = 30 + 10 = 40 a_{5} = a_{4} + d = 40 + 10 = 50$
Therefore, the group of numbers will be 10, 20, 30, 40, 50, …
The first four terms of this A.P are 10, 20, 30, and 40.

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Sum of First n Terms of an AP

Standard X Mathematics

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Question 2 (i) Write first four terms of the A.P. when the first term "a" and the common difference "d" are given as follows. (i) a = 10, d = 10

Given, a=10 and d=10 Let the group of numbers be a1,a2,a3,a4,a5, … a1=a=10a2=a1+d=10+10=20a3=a2+d=20+10=30a4=a3+d=30+10=40a5=a4+d=40+10=50 Therefore, the group of numbers will be 10, 20, 30, 40, 50, … The first four terms of this A.P are 10, 20, 30, and 40.

Question 2 (i)
Write first four terms of the A.P. when the first term "a" and the common difference "d" are given as follows.
(i) a = 10, d = 10