express in factorial notation (n+2)(n+1)n
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we know n! = n(n-1)(n-2)........
so if we multiply n! with (n+1)(n+2) then it becomes (n+2)! which is (n+2)(n+1)n (n-1)(n-2).....
then we want to express (n+2)(n+1)n in factorial notation so it will be = (n+2)!/(n-1)!
hope it helps ....
so if we multiply n! with (n+1)(n+2) then it becomes (n+2)! which is (n+2)(n+1)n (n-1)(n-2).....
then we want to express (n+2)(n+1)n in factorial notation so it will be = (n+2)!/(n-1)!
hope it helps ....
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