LET N BE A POSITIVE INTEGER SUCH THAT N! = 1 × 2 × 3 × … × N. WHA...
1.
Let n be a positive integer such that n! = 1 × 2 × 3 ×
… × n. What is the result
of
3
4
5
6
7
8
+ +
+ +
+ +
+ +
+ +
+ +
?
1! 2! 3!
+
2! 3! 4!
+
3! 4! 5!
+
4! 5! 6!
+
5! 6! 7!
+
6! 7! 8!
Answer :