1.

What is the general term of (x – y)xy?

A. x – yCr (xxy – r . yr)
B. xyCr (xx – y – r . -yr)
C. xyCr (xxy – r . -yr)
D. x – yCr (xx – y – r . yr)
Answer» D. x – yCr (xx – y – r . yr)


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