derivatio
derivatio
The general form of the equation is
y = Ωxα …………………………………………………………………………………………………………………(1)
Constants α and Ω are determined from the ancient text.
The phrase five of you shall chase a hundred implies that y = 100 when x = 5. Substitution of these values into Equation 1 results in
100 = (Ω)5α ………………………………………………………………………………………………………..(2)
The solution of Equation 2 for Ω is
Ω = 100/5α ………………………………………………………………………………………………………….(3)
Substitution of Equation 3 into Equation 1 results in
y = (100/5α)xα…………………………………………………………………………………………………….(4)
Combination of the terms with the α exponent results in
y = 100(x/5)α ……………………………………………………………………………………………………..(5)
The phrase a hundred of you shall put ten thousand to flight implies that y = 10,000 when x = 100. Substitution of these values into Equation 4 result in
10000 = 100(100/5)α ………………………………………………………………………………………(6)
Upon simplification, Equation 6 becomes
100 = 20α ……………………………………………………………………………………………………………(7)
Application of the natural logarithm on both sides of Equation 6 produces
ln(100) = α ln(20)……………………………………………………………………………………………..(8)
Finally, the solution of Equation 8 for α is
α = ln(100)/ln(20)……………………………………………………………………………………………..(9)
Alpha is a very unique number. It is an irrational number, expressed by an infinite number of digits in the decimal system:
α = 1.53724357368 •••
The final form of the equation is
y = 100(x/5)1.53724357368 •••