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Let →a=^i−^j+^k,→b=3^i−4^j+5^k. If →r×→a=→r×→b and →r⋅(2^i+4^j+^k)=−4, then the value of →r⋅(^i+^j+^k)= |
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Answer» Let →a=^i−^j+^k,→b=3^i−4^j+5^k. If →r×→a=→r×→b and →r⋅(2^i+4^j+^k)=−4, then the value of →r⋅(^i+^j+^k)= |
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