Ron Leach wrote:
It's been a long while in doing the math problems, so please pardon the OT. I was wondering if anyone would be able to help with the following math problem (a little break from the normal stuff :-)) 1/2(e^x + e^-x) = 4, solve for x.
1/2(e^x+e^-x)=4 e^x + e^-x = 8 e^x = 8 - e^-x ln(e^x) = ln(8-e^-x) x(ln(e)) = ln(8-e^-x) x = ln(8-e^-x) or 1/2(e^x+e^-x)=4 e^x + e^-x = 8 e^x + 1/(e^x) = 8but that's as close as I could get. Empirically the answer is x=7.8729, but I can't quite pin down how to calculate that. Also this equation is a parabola, though I'm not sure how helpfull that is. Not being able to solve for x+(1/x)=y is driving me nuts, someone help me out here.
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