Question

x+1+x+2+x+3........​

Answer 1

Answer:

3x + 6

Step-by-step explanation:

x + 1 + x + 2 + x + 3

= 3x + 6

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Answer 2

Answer:

x+1+x+2+x+3+........

(x+x+x+ .......n ) +(1+2+3+..... n)

x(1+1+1.... n) +(1+2+3+..... n)

x*n +n*(n+1) /2

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