Problem: The value of x−yx−yx-y^{x-y}x−yx−y when x=2x=2x=2 and y=−2y=-2y=−2 is:
Answer Choices:
A. −18-18−18
B. −14-14−14
C. 141414
D. 181818
E. 256256256 Solution:
2−(−2)4=2−16=−142-(-2)^{4}=2-16=-142−(−2)4=2−16=−14.