60 points
Find the sum
1.2.3.4.5+ 2.3.4.5.6+3.4.5.6.7
+ ... + (n - 4)(n-3)(n-2)(n-1).n
Answers
Answered by
1
Answer:
Sorry i don't know the answer
Answered by
1
Answer:
sorry I dont know.
good night
sweet dreams.
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