观察规律并填空
(1﹣)=
•
=
;
(1﹣)(1﹣
)=
•
•
•
=
=
(1﹣)(1﹣
)(1﹣
)=
•
•
•
•
•
=
•
=
;
(1﹣)(1﹣
)(1﹣
)(1﹣
)=
•
•
•
•
•
•
•
=
•
=
;
…
(1﹣)(1﹣
)(1﹣
)(1﹣
)…(1﹣
)=
.(用含n的代数式表示,n是正整数,且n≥2)
观察规律并填空
(1﹣)=
•
=
;
(1﹣)(1﹣
)=
•
•
•
=
=
(1﹣)(1﹣
)(1﹣
)=
•
•
•
•
•
=
•
=
;
(1﹣)(1﹣
)(1﹣
)(1﹣
)=
•
•
•
•
•
•
•
=
•
=
;
…
(1﹣)(1﹣
)(1﹣
)(1﹣
)…(1﹣
)=
.(用含n的代数式表示,n是正整数,且n≥2)