a0=1,a1=3 and
an=2an−1+an−2
How do I obtain a closed form for this sequence? We have learned about the method of characteristic roots, but I am unsure how to take that and turn this into a closed form.
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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