$$ Part $($c$)$

The function f$($x$)=(1+$x$)1/2$f$($x$)=(1+$x$)1/2$ may be rewritten using a Taylor expansion, and when xx is very small, the approximate form f$($x$)$$+$x$+$f$($x$)$$+$x$+$ where and are simple numeric factors, and the higher$-$order terms are negligibly small. Input the form of the approximate expression with the correct numeric factors.

$(1+$x$)12(1+$x$)-12=$