Current location - Training Enrollment Network - Mathematics courses - (1+ax+by) "The sum of the absolute values of the coefficients of the terms without X in the expansion of n is 243. . . It is the problem of 09 Jiangxi science mathematics. thank you
(1+ax+by) "The sum of the absolute values of the coefficients of the terms without X in the expansion of n is 243. . . It is the problem of 09 Jiangxi science mathematics. thank you
Something is wrong upstairs.
Considering (1+by) as a whole, (1+by) n is the coefficient of the term without X.