Here is the question with a possible error.

(ex) When solving \(\displaystyle \frac{3n(n-2)!}{(n-3)!}=105\) algebraically for n, which answer is eliminated because of the restrictions on factorials?

(a) -5

(b) -4

(c) -3

(d) -2

The answer key says the answer is (a). But, I think all the answers can be eliminated because they all give negative factorials when you plug them into the equation. Do you think there is a typo? Thanks.

(ex) When solving \(\displaystyle \frac{3n(n-2)!}{(n-3)!}=105\) algebraically for n, which answer is eliminated because of the restrictions on factorials?

(a) -5

(b) -4

(c) -3

(d) -2

The answer key says the answer is (a). But, I think all the answers can be eliminated because they all give negative factorials when you plug them into the equation. Do you think there is a typo? Thanks.

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