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General

Easy

Question

# What number does C3 represent in the expansion ? Explain.

Hint:

### The binomial expansion is , here n ≥ 0 .

The value of

We are asked to find what number does C3 represent in the expansion .

## The correct answer is: = 4

Step 1 of 2:

The expansion is:

Here, C_{3} represents the coefficient of ab^{3} in the expansion.

Step 2 of 2:

The value of n=4, so the value of C_{3} is:

The value is called the combination permutation.

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