If we add first n numbers, we get ______(a) \(\frac{n (n+1)}{2}\)(b) n-1(c) n^2(d) n^2-1The question was asked in my homework.I want to ask this question from Patterns in Squares in chapter Squares and Square Roots of Mathematics – Class 8

If we add first n numbers, we get ______(a) \(\frac{n (n+1)}{2}\)(b) n

1.	If we add first n numbers, we get ______(a) \(\frac{n (n+1)}{2}\)(b) n-1(c) n^2(d) n^2-1The question was asked in my homework.I want to ask this question from Patterns in Squares in chapter Squares and Square Roots of Mathematics – Class 8
Answer» Right option is (a) \(\frac{n (n+1)}{2}\) Explanation: If we add FIRST n numbers we get \(\frac{n (n+1)}{2}\). For example, if we add 1 + 2 + 3 + 4 + 5, we get 15. Here, we added first 5 numbers. Here, \(\frac{n (n+1)}{2} = \frac{5 (5+1)}{2} \)= 15. Hence, \(\frac{n (n+1)}{2}\) would be the CORRECT answer and the other OPTIONS would be INCORRECT.

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If we add first n numbers, we get ______(a) \(\frac{n (n+1)}{2}\)(b) n-1(c) n^2(d) n^2-1The question was asked in my homework.I want to ask this question from Patterns in Squares in chapter Squares and Square Roots of Mathematics – Class 8

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