Question

What is the sign of the third term of the expansion of (x - y)n for n = 3, 4, and 5?

a.
positive

b.
negative

Answer 1

ANSWER

a.

positive

EXPLANATION

The given binomial expansion is:

${(x - y)}^{n}$

We can see that the second term is negative (-y).

When we expand this binomial for n=3,4, and 5, the sign is got to alternate.

The first term is positive

The second term negative

The third term is positive

The first choice is correct.

Answer 2

Answer:

A;)

Step-by-step explanation:i dont have negative sign