SAVE MY ASS AND I NEED TO SOLVE THE FACTORIAL EQUATION

[solid plover]

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[plain ridge]

You can cancel n! on both sides.

(n - 5)!/(n - 3)! = (n-5)(n-6)(n-7)...1/(n - 3)(n - 4)(n - 5)... 1 so we can cancel the like terms and get 1/(n - 3)(n - 4).

42 = (n- 3)(n - 4).

Use quadratics and get the answer.

[lyric ember]

Or just, like, note that (n - 3) and (n - 4) are consecutive natural numbers.

Which multiply to 42.

[plain ridge]

That works too.

m(m + 1) = 42 where m is a natural number.

[vernal crescent]

Sry for the late reply I get it now thanks guys! 🙂

+close