## Thinking Mathematically (6th Edition)

$\frac{17!}{9!}$ = $\frac{17*16*15*14*13*12*11*10*9!}{9!}$ 9! is common in the numerator and the denominator of the given expression, so cancel 9!. Therefore, evaluate $17*16*15*14*13*12*11*10 = 980,179,200$