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Let a, b, c, d be real numbers such that...

Let a, b, c, d be real numbers such that
`sum_(k=1)^(n) (ak^(3) + bk^(2) + ck + d) = n^(4)`
or every natural number n. Then | a | + | b | + | C | + | d | is equal to

A

15

B

16

C

31

D

32

Text Solution

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The correct Answer is:
A
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