(1.2.2)--英3.1.2 Definition and Properties线性代数线性代数.ppt

LinearAlgebra3.1.2DefinitionandPropertiesofLinearCombinationandLinearRepresentation

?????;?and?arecollinear.Geometry:?Thereisauniquerealscalarksuchthat?=k?Called:?canbelinearlyrepresentedby?.

Geometry:???k1?k2?=k1?+k2??and?arenotcollinear;?,?and?arecoplanar?Therearerealscalarsk1、k2suchthat?=k1?+k2?Called:?canbelinearlyrepresentedby?,?

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?n=,?1n?2n??sn?2=,?12?22??s2?1=,?11?21??s1…,?=,b1b2?bs????=?k1k2?kn?

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