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If (x ^(2) +x+1) + (x^(2) + 2x +3) + (x^...

If `(x ^(2) +x+1) + (x^(2) + 2x +3) + (x^(2) + 3x +5) + ….. + (x ^(2) + 20x + 39) =4500,` then x is equal to :

A

10

B

`-10`

C

20.5

D

`-20.5`

Text Solution

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The correct Answer is:
A, D
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