if y=6x+1 then dy/dx=?

if y=6x+1 then dy/dx=? If dy/dx=2y^2 and if y= -1 when x=1,then when x=2,y=? dy/dx=1+1/(x-y) dy/dx=1-cos(y-x) dy/dx=x(1-y) dy/dx = 1/x-y dy/dx=x+y dy/dx=?,if y=[3^√x+1]^4Y等于（x+1开3次方）^4,求dy/dx=?, y=sin-1 x 求导那个﹣1是﹣1次方原题其实是 if x=根号下1-t2 and y=sin-1t,then dy/dx equals... Find dy/dx if ln(y)=e^(6y)sin(4x),求 y`(x)=?如题 微分方程(x+y)(dx-dy)=dx+dy的通解 (x^2)dy+（y^2)dx=dx-dy 二阶求导数Find d^2y/dx^2 if y^2+2y=4x^2+2x2y*dy/dx+2*dy/dx=8x+2dy/dx=(4x+1)/(y+1)d^2y/dx^2=(4(y+1)-4(x+1)(dy/dx))/(y+1)^2我不明白最后的一步.为什么那里要乘上dy/dx?按照除法则不是应该乘上y+1的导数吗?但是下一步 dy/dx,y=(1+x+x^2)e^x 设y=（x/1-x)^x,求dy/dx 求微分方程y－dy／dx=1＋x×dy／dx的通解 dy/dx=x(1+y^2)/y通解 已知y=x^(1/y),求dy/dx?