amaresh92
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whats the summation of a^n for a>1 over summation n=0 to N
thanks.
thanks.
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DonAntonio
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amaresh92 said:whats the summation of a^n for a>1 over summation n=0 to N
thanks.
Hint: for [itex]\,r\neq 1\,[/itex] a constant, we have
$$\sum_{n=0}^mr^n=\frac{r^{m+1}-1}{r-1}$$
DonAntonio
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This is the sort of thing most people just look that up - do you need to work out the formula or what?
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