If `u=(1)/(x^(2)+y^(2)+z^(2))"`,find the value of `(delta^2 u)/(delta x^2)`+`(delta^2 u)/(delta y^2)`+`(delta^2 u)/(delta z^2)`

If u=(x^(2)+y^(2)+z^(2))^(-1/2) show that x(del u)/(del x)+y(del u)/(del y)+z(del u)/(del z)=-u

If u=(x^(2)+y^(2)+z^(2))^(-1/2) show that x(del u)/(del x)+y(del u)/(del y)+z(del u)/(del z)=-u

Consider the following reaction which proceeds in a closed vessel. 3X to 2Y +Z The rate of disappearance of X,-(Delta [X])/(Delta t) is found to be 0.075 mol L^(-) s^(-) calculate (Delta [y])/(Delta t) and ( Delta [Z])/( Delta t)

How it is possible to find the value of Delta U and not the value of U?

In which of the following Delta H = Delta U ?

If "Delta"_1=|x bb a x b a a x|a n d"Delta"_2=|x b a x| are the given determinants, then "Delta"_1=3("Delta"_2)^2 b. d/(dx)("Delta"_1)=3"Delta"_2 c. d/(dx)("Delta"_1)=3("Delta"_2)^2 d. "Delta"_1=3"Delta"2 3//2

If Delta be area of incircle of a triangle ABC and Delta_1,Delta_2,Delta_3 be the area of excircles then find the least value of (Delta_1 Delta_2 Delta_3)/(729 Delta^3)

Find the perimeter of a triangle whose sides are 2y+3z, z-y, 4y-2z .