Find the minimum value of A=x^2 + y^2 if x + y =10

Find the minimum value of A=x^2 + y^2 if x + y =10 Find the minimum value of the function f(x,y)=8x^2+6y^2+20xy the minimum value of y=x^3-x on the interval (0,1) If sin(x) = 4/5,pi/2 < x < pi,find the value of sin(2x) Find the first derivative of y = x^(x - 2) If cos(a) = 2/3,find the value of cos(4a) given that f(x)=2x-3,find the value of f(x+h). For what value of A is the plane 2x-2y+z=3 is tangent to the Find the value of c that satisfy Roll's theorem for f(x)=x^2 find the (d^2y)/(dx^2) if x^2-y^2=16 given that x=(Sin(2/5))^(-1),find the exact value of 1.(Cosx Find the gradient of the tangent to the curve y=(3x-2)(x+4)