To obtain the sum to ( 2n ) terms, replace ( n ) by ( 2n ) in the formula for ( S_n ) obtained from the given ( n^{th} ) term.
Accedmychevron_right11thchevron_rightmathchevron_rightSequences And Serieschevron_rightExercise 6.10
To obtain the sum to ( 2n ) terms, replace ( n ) by ( 2n ) in the formula for ( S_n ) obtained from the given ( n^{th} ) term.