R formula Part I

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The R formula is as follows
























What's Next?
Click here for R formula Part II
Click here for Contents Page

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Binomial Theorem

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Image
Question

If the first 3 terms of the expansion of are , find the value of x and n

Solution

Recall the binomial expansion formula



Next we need to simplify



Going back to the question,


We can then form 2 equations involving n and x

Equation 1


Equation 2
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