Question

If A=(-7,8,1) and B(8,7,7), find ||AB||. Round to 3 decimal places

Answer 1

Given,

A= (-7, 8, 1).

B= (8, 7, 7)

The value of ||AB|| is,

`\begin{gathered} \mleft\Vert AB\text{ }\mleft\Vert\text{ = }A.B\mright?\mright? \\ \end{gathered}`

The value of A.B is ,

`\begin{gathered} A\mathrm{}B=(-7.8+8.7+1.7) \\ AB=(-56+56+7) \\ AB=7 \end{gathered}`

Hence, the value is 7.