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Let f(x, y, z) = xy^3 + z^2 and x = s^3t^3, y = st^3, and z = s^2t^2 Calculate t

ID: 2876956 • Letter: L

Question

Let f(x, y, z) = xy^3 + z^2 and x = s^3t^3, y = st^3, and z = s^2t^2 Calculate the primary derivatives partial differential f/partial differential z = partial differential f/partial differential y = partial differential f/partial differential z = Calculate partial differential x/partial differential s = partial differential y/partial differential s = partial differential z/partial differential s = Use the Chain Rule to compute partial differential f/partial differential s = In (c) express your answer in terms of the independent variables t, s

Explanation / Answer

given f(x,y,z)=xy3+z2

a)

f/x=y3

f/y=3xy2

f/z=2z

x=s3t3,y=st3,z=s2t2

b)

x/s=3s2t3

y/s=t3

z/s=2st2

c)f/s =(f/x *x/s)+(f/y *y/s)+(f/z *z/s)

f/s =((y3)*(3s2t3))+((3xy2)*(t3))+((2z)*(2st2))

f/s =(((st3)3)*(3s2t3))+((3(s3t3)(st3)2)*(t3))+((2(s2t2))*(2st2))

f/s =(s3t9 *3s2t3)+(3(s3t3)(s2t6)*t3)+(2(s2t2)*2st2)

f/s =(3s5t12)+(3s5t12)+(4s3t4)

f/s =(6s5t12)+(4s3t4)