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The sum of the real values of x for which the middle term in the binomial expansion of 8 3 x 3 3 x ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ + equals 5670 is :

1. 0
2. 8
3. 6
4. 4

Correct answer: 0

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