Question

The coefficients corresponding to k = 0, 1, 2, ..., 4 in the expansion of (x + y)²
are
A. 1, 4, 6, 4, 1
B. 0, 1, 4, 6, 4, 1,0
C. 0, 4, 6, 4, 0
D. 1,4,6,6,4,1

Answer 1

B. 0, 1, 4, 6, 4, 1,0