I just posted the same question the education thread...but this area gets more traffic.
E (greek letter "sigma") 500*e^(ln(1/2)n/1.5) from n=0 to n=6.
So 6 = 1300
So I try it...
500*e^(ln(1/2)n/1.5)
500*e^(ln(0.5)6/1.5)
500*e^(-.6931*6/1.5)
500*e^(-2.7724)
500*0.0625
31.26
WTF!! :scratch:
Man I didn't think it was that long ago that I had to use a natural logarithm.