Two Equal Greatest Terms

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Two Equal Greatest Terms

## Formula

If two consecutive terms are equal:

$$T_{r+1}=T_{r+2}$$

then:

$$\frac{n-r}{r+1}\frac ba=1$$

Therefore:

$$\frac{n-r}{r+1}=\frac ab$$

## Usage

- Used when a binomial expansion has two equal greatest terms.

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