Recent content by flower321

if (d/dx) cos(x) = -sin(x) then (d/d{1/x}) cos(x) = ? i.e. the derivative of cos(x) with respect to 1/x

x(dA/dt) + (dx/dt)A + y(dA/dZ) + (dy/dZ) A = 0 can we remove the arbitrary function A from the equation? i.e. x(d/dt) + (dx/dt) + y(d/dZ) + (dy/dZ) = 0 is it true?

ok, if it is a sum operator then how it is act?

no this is not a usual calculas, this is discrete calculus, i.e. Df_{n} = f_{n+1}-f_{n}, where D is the forward difference operator, then how an anti-difference act on the product of two discrete functions?

hi, i want to ask you that how to perform an anti-difference operator on the product of two functions? i.e. D^{-1}(f_{n} g_{n})

hi, anyone can have the idea how to solve the log of a power series? i.e. log(1+ Σ_{j=1}^{∞}(1/z^{2 j-1}) f^{j})

which type i show work

please reply anyone and give answer this m worry about thatttttt

First part is so simple first you write the l^2 in the form of x,y and z-coordinates and then add it you see the book of neuredine zettlie of quantum mechanics

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