Differentiate:
#6. y=(2x-1)^3(x+7)^-3
A) dy/dx=45(2x-1)^3(x+7)^-2
B) dy/dx=45(2x-1)^2(x+7)^-3
C) dy/dx=45(2x-1)^2(x+7)^-4
D) dy/dx=45(2x-1)^3(x+7)^-4

#7. h(z)=fourthroot(3z+9/-7z+8)
A) h'(z)=1/4[87/(-7+8)^2]^-3/4
B) h'(z)=1/4(3z+9/-7z+8)^-3/4
C) h'(z)=1/4(3z+9/-7z+8)^-3/4
D) h'(z)=-3/28(3z+9/-7z+8)^-3/4


#8. f(x)=(4x+2/x-4)^3
A) f'(x)=(4x+2/x-4)^2*18/(x-4)^2
B) f'(x)=(4x+2/x-4)^2
C) f'(x)=(4x+2/x-4)^2
D) f'(x)=[-54/(x-4)^2]^2



Find the equation of the line tangent to the graph of the function at the indicated point.
#9. y=(x^3-3x)^4/(2x-5)^2 at the point (2,16)
A) y=-224(x-2)+16
B) y=352(x-2)+16
C) y=224(x-2)+16
D) f'(x)=[-54/(x-4)^2]^2