1.

What is the expansion of (x + y)1000?

A. ( Sigma_{r = 0}^{r = 1000} )(1000Cr x<sup>r 1000</sup> y<sup>r</sup>)
B. ( Sigma_{r = 0}^{r = 1000} )(100Cr x<sup>1000 r</sup> y<sup>r</sup>)
C. ( Sigma_{r = 0}^{r = 999} )(1000Cr x<sup>r 1000</sup> y<sup>r</sup>)
D. ( Sigma_{r = 0}^{r = 999} )(1000Cr x<sup>1000 r</sup> y<sup>r</sup>)
Answer» C. ( Sigma_{r = 0}^{r = 999} )(1000Cr x<sup>r 1000</sup> y<sup>r</sup>)


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