If a, b, c be any real numbers , Suppose that there are real numbers x,y,z not all zero such tha....

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If `a,b,c` are all non-zero and `a+b+c=0`, prove that `a^2/(bc)+b^2/(ca)+c^2/(ab)=3`

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If 𝐚, 𝐛 0:01:29

If 𝐚, 𝐛 and 𝐜 are unit vectors such that 𝐚 + 𝐛 + 𝐜 = 0, then the value of 𝐚∙𝐛 + 𝐛∙𝐜 + 𝐜∙𝐚 is...

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