Find (dy)/(dx) , a sin (xy)+b log y=c

If x^2 + 4xy + 4 = 0 , then x : y =

Answer the following questions : (Alternatives are to be noted): If r_(xy) = 0.8 , find r_(uv) where u = x+5 , v = 3 - y .

If ax^2+bxy+cy^2 =0 , find x:y.

If a^x=b^y=c^z" and "abc=1 , then prove that xy+yz+zx=0 .

Find (dy)/(dx) when : e^(xy)-4xy=4

xy=( x+y )^n and dy/dx = y/x then n= 1 b. 2 c. 3 d. 4

Answer the following questions (Alternatives are to be noted) : Prove that abs(r)= sqrt(b_(yx).b_(xy)) where r and b_(xy) , b_(yx) are the correlation and regression coefficients respectively.

(x^(2) - y^(2)) dx + 2xy dy = 0

Find the product of the (-4xy), (-4xy).