Theorem oIf fand g are integrable on [a,b]and if c is a constant,then cf,fg are integrable on [a,b] and d-e"fdx o[f±ga]&=心)dr Theorem ⚫ If f and g are integrable on [a,b] and if c is a constant, then cf, f±g are integrable on [a,b] and     ( ) ( ) ( ) ( ) ( ) ( ) b b a a b b b a a a cf x dx c f x dx f x g x dx f x dx g x dx =  =      