1.

Let →a=^i−2^j+3^k, if →b is a vector such that →a.→b=|→b|2 and |→a−→b|=√7, then |→b|=

Answer»

Let a=^i2^j+3^k, if b is a vector such that a.b=|b|2 and |ab|=7, then |b|=



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