1/v.=torque + (v'+v.)/(v'-v.)*torque - length
v.=relative velocity stream
v'=relative velocity of motorboat
2/3 - 1
1/3 - 1
what is 1+2+3+4...up to 99
5x - 17 = 2x - 18
ln(x+3)=0
x-(2.8+0.15x)=0.20x
Find dy/dx
When 2x+3y+cos x +cos y= 2
x+3
