we have to write a formual
y=9^n+1 ( the n+1 is in the exponent) thanks :)
2007-06-20 20:16:21 · 3 answers · asked by fast.lane17 1 in Science & Mathematics ➔ Mathematics
what formula?
or you mean u need to solve for n?
here it is:
y = 9^(n+1)
log y = log 9^ (n+1)
use the rules in logarithm...
log y = (n+1) log 9
(log y)/(log 9) = n+1
[log (y-9)]-1 = n
then the answer is n = -1+log (y-9)
2007-06-20 20:54:20 · answer #1 · answered by Roger M 2 · 0⤊ 0⤋
This is a formula - what's the problem?
If you want a formula for n in terms of y, then we have
y-1 = 9^n
=> n = log_9 (y-1)
where log_9 means log base 9.
2007-06-21 03:20:27 · answer #2 · answered by Scarlet Manuka 7 · 0⤊ 0⤋
Well, you have an equation already.
What formula do you need?
2007-06-21 03:23:41 · answer #3 · answered by powhound 7 · 0⤊ 0⤋