Find the sum of the series which is given by, (1) + (2+3) + (4+5+6) + (7+8+9+10) + . . . upto n terms.

Here each expression in the paranthesis needs is to be supposed as a single term of series.

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Anew landowner is interested in constructing a fence around the perimeter of her property. her property is 1,080√30 feet wide and 500√20 feet long. what is the perimeter of the property? (recall that the perimeter is the sum of each side of a shape or boundary). a 1,580√40 feet b. 5,320√5 feet c. 3,160√20 feet d. 10,640√5 feet