题目内容
计算:(1-
)(1-
)(1-
)……(1-
)(1-
).
原式=(1-
)(1+
)(1-
)(1+
)(1-
)(1+
)……(1-
)(1+
)(1-
)(1+
)=
×
×
×……×
×
=
×
=
.
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题目内容
计算:(1-
)(1-
)(1-
)……(1-
)(1-
).
原式=(1-
)(1+
)(1-
)(1+
)(1-
)(1+
)……(1-
)(1+
)(1-
)(1+
)=
×
×
×……×
×
=
×
=
.