The remainder when 1! +2!+3!.......................+77! Is divided by 7
Answers
Answered by
1
Answer:
0
Step-by-step explanation:
because in 7!=7×6×5×4×3×2×1 ,7 will be cancelled and 6! will take place
Answered by
1
Step-by-step explanation:
It is an Ap
1,2,3,................,77
a=1
d=1
l=77
then
a(n)=a+(n-1)d
a(n)=75
s(n)=n/2(a+l)
s(n)=2925
2925/7=417.87=answer
reminder=6
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