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math

posted by on .

#1
If
v=(6-(r^3/3))h and h/(2-r)=5/2

write V as a function of h .
Simplify the function so that you can express it as a polynomial in h .

#2
If y=ln(x) , write ln(x^x) as a simple function of y

thxs alot!

  • math - ,

    2 h = 10 - 5 r
    5 r = 10-2h
    r = 2 -(2/5) h

    v = h(6 - (1/3)(2 - (2 h/5))^3 )
    Yuck, you can multiply it out

    ln x^x = x ln x = x y
    but
    e^y = x
    so
    ln x^x = y e^y

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