Question 0503b

Sigma Notation
Factorials

Question

Express
4n!−4(n−1)!\frac{4}{n!} - \frac{4}{(n - 1)!}
in the form
An+Bn!\frac{An+B}{n!}
where A{A} and B{B} are constants to be determined.

Attempt

A={A=}
B={B=}

Answer

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