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प्रश्न
Find the values of c which satisfy `|"c"overline"u"|` = 3 where `overline"u" = hat"i" + 2hat"j" + 3hat"k"`.
उत्तर
`|"c"overline"u"|` = 3
`overline"u"=hat"i"+2hat"j"+3hat"k"`
`vec"a"=xhat"i"+"y"hat"j"+"z"hat"k"`
`|overline"a"|=sqrt(x^2+"y"^2+"z"^2)`
⇒ `|vec"u"|=sqrt((1)^2+(2)^2+(3)^2)`
= `sqrt(14)`
= c`|vec"u"|` = 3
c`sqrt14` = 3
∴ c = `3/sqrt(14)`
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