For $\int f ( x ) d x$ A) $( - 9,9 )$

Multiple Choice

$\text { Consider the function given by } f ( x ) = \sum _ { n = 0 } ^ { \infty } \left( \frac { x } { 9 } \right) ^ { n } \text {. Find the interval of convergence }$ for $\int f ( x ) d x$

A) $( - 9,9 )$
B) $( - 9,0 ]$
C) $[ - 9,9 ]$
D) $[ - 9,9 )$
E) $( 0,9 )$ .