首页
展开式中不含x3项的系数的和为A.-1B.0C.1D.-2
试题详情
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADcAAAAcCAYAAADFsCezAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
展开式中不含x
3项的系数的和为( )
A.-1
B.0
C.1
D.-2
相关试题
-
记二项式(1+2x)n展开式的各项系数和为an,其二项式系数和为bn,则
等于( )
A.1
B.-1
C.0
D.不存在
-
记二项式(1+3x)n展开式的各项系数和为an,其二项式系数和为bn,则
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAhCAYAAAC4JqlRAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAFTSURBVFhH7ZfbDcMgDEU9GTt5HS/DKIziYszT
VRJaJaUfVIoaFMAn1wZugBf/YHF8PgcIxA6A0QtmYHLAjsKtzMcAOTgsA0gv3Stw64vXyS5qwDNW
BVYD9Gqke8cUFFDSBKlQWnu2VuYUIE1FqofuHgBjSImLCjG087ML4eYANEpLR1Ugz37VPoHYAP+s
gO58WlxHl1kJdmWUovy+Bp5Z+/2sf34YPS/AxWm4AbYCW4HfKFBMxHi2zxoKtQOyJY+0HnujIn3a
dt7PnXfCCOGIgxgLcTblf1oBOTc6iDhenbSaFUQxLM2gBHL1uQLETi46HcyjhFYopeP5YfR+SOk4
UqdUGayd90xZsgSg8hRC8zZTKoxjRgBJsU3RAGA6iL2SdEwFLiqbAElRnSGpiMQUrzLnmAITUB5+
UoBHnC19WdnuQ2coQhuwVOsdEDMibj+wXIEXx2INmXS896AAAAAASUVORK5CYII=
)
等于( )
A.1
B.-1
C.0
D.不存在
-
若二项式
的展开式中第5项是常数项,则展开式中各项系数的和为( )
A.-1
B.1
C.212
D.215
-
展开式中含x3项的系数为( )
A.-1
B.1
C.0
D.2
-
的展开式中
的系数为( )
A.1
B.6
C.10
D.15
-
(2-
)8展开式中不含x4项其它所有项的系数和为( )
A.-1
B.1
C.0
D.2
-
展开式中不含x4项的系数的和为( )
A.-1
B.0
C.1
D.2
-
展开式中不含x4项的系数的和为( )
A.-1
B.0
C.1
D.2
-
展开式中不含x4项的系数的和为( )
A.-1
B.0
C.1
D.2
-
展开式中不含x4项的系数的和为( )
A.-1
B.0
C.1
D.2