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यदि bar(a)=bar(i)+2bar(j)+bar(k),bar(b)=...

यदि `bar(a)=bar(i)+2bar(j)+bar(k),bar(b)=bar(i)-bar(j)-bar(k)` तथा `bar(c)=3bar(i)-bar(j)+4bar(k)`, तो दर्शाइए कि
`bar(a).(bar(b)+bar(c))=bar(a)cdot bar(b)+bar(a)cdot bar(c).`

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