I know there is a 5 on the sequence, but i don't know how and why his presence leads to the final units digit of the product.
Answer
Hint: All odd numbers divisible by 5 end in 5.
How to find limh→0sin(ha)h without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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