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#2: Post edited
Is $$x=\int \int \ddot{x}\mathrm dx \mathrm dx$$?
- Is $x=\int \int \ddot{x}\mathrm dx \mathrm dx$?
#1: Initial revision
Is $$x=\int \int \ddot{x}\mathrm dx \mathrm dx$$?
I know that multivariable calculus used like this
$$\phi = \int \int x \mathrm dx \mathrm dy$$
But, I was thinking to use double integral for single variable (double integral respect to single variable)
$$x=\int \int \ddot{x}\mathrm dx \mathrm dx$$
Is it correct? Or, there's better way to write it?