1.

For any vectors vec(a),vec(b) and vec( c ). Out of the following, which statement is true ?

Answer»

`VEC(a)XX(vec(B)xx vec( C ))=(vec(a)xx vec(b))xx vec( c )`
`vec(a)xx vec(b)=vec(b)xx vec(a)`
`vec(a).(vec(b)xx vec( c ))=(vec(a).vec(b))xx(vec(a).vec( c ))`
`vec(a).(vec(b)-vec( c ))=vec(a).vec(b)-vec(b).vec( c )`

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