The sum, of the coefficients of the first 50 terms in the binomial expansion of $( 1 - x ) ^ { 100 }$, is equal to (1) ${ } ^ { 101 } C _ { 50 }$ (2) ${ } ^ { 99 } C _ { 49 }$ (3) $- { } ^ { 101 } C _ { 50 }$ (4) $- { } ^ { 99 } C _ { 49 }$
The sum, of the coefficients of the first 50 terms in the binomial expansion of $( 1 - x ) ^ { 100 }$, is equal to\\
(1) ${ } ^ { 101 } C _ { 50 }$\\
(2) ${ } ^ { 99 } C _ { 49 }$\\
(3) $- { } ^ { 101 } C _ { 50 }$\\
(4) $- { } ^ { 99 } C _ { 49 }$