Question

(1) +(1+1)+(1+1+1)+...+(1+1+1..+(n-1)) or 1+2+3+...+(n-1)

(1+1+1+1...+(n-1)) terms

(a)n(n-1)/2

(b) n(n+1)/2


(c) n

(d) n*n

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Answer 1

Answer:

n

Step-by-step explanation:

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