Question:

Find the sum of first 123 even natural numbers.

Answer:

The first 123 even natural number is
2, 4, 6, …….
Where first term a = 2
Second term t1 = 4
Third term t2 = 6
Thus, common difference d = t2 – t1 = 6 – 4 = 2
n = 123
By using sum of nth term of an A.P. is

Maharashtra Board Solutions for Class 10 Maths Part 1 Chapter 2 - Image 13

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