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i have learning the boock of Shutz , and i not understand why the Christoffel symbol for the potential

[tex]\phi [/tex] with [tex]|\phi |<<1[/tex] .

[tex]\Gamma^0_{00}= \frac{\phi,_0}{1+2\phi} [/tex] is written as

[tex]\Gamma^0_{00}= \phi,_0 + 0( \phi^2)[/tex]

I dont see the quadratic term [tex]0( \phi^2)[/tex] . I tried with Taylor, but i dont understand

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# Shutz relativity

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