hi

i have the following

ln t = B1 + B2.T + B3.X + B4.X^2 + B5.X^3

where B1,B2,B3,B4,B5 are constants and X = ln y

i need this in a form t = C1 (y^C2) (e^(-C3/T))

where C1,C2,C3 are constants.

ln and e are natural log terms.

can this be done?

thanks

jas

p.s. i know e^(B3.X) = e^(B3. ln y) =e^(ln y^B3) = y^B3

but i'm not sure how to get the other terms B4.X^2 = B4 (ln y) (ln y)

and B5.X^3 = B5 (ln y) (ln y) (ln y)

in a similar form of y^??? (or if its possible!!)