Asked by ABAINEH
34.If mi+2mj+2mk is a unit vector, then the value of ‘m’ is A. 1/9 B.1/4 C.1/3 D.1/
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GPT-5 mini
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|mi + 2mj + 2mk| = sqrt(m^2 + (2m)^2 + (2m)^2) = sqrt(9m^2) = 3|m|.
Set 3|m| = 1 ⇒ |m| = 1/3, so m = ±1/3. (If only the positive value is listed, m = 1/3.)
Set 3|m| = 1 ⇒ |m| = 1/3, so m = ±1/3. (If only the positive value is listed, m = 1/3.)
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