Let →a=i+2j+3k if →b is a vector such that →a,→b=|→b| and |→a−→b|=√7, then |→b|= ____________

Let →a=i+2j+3k if →b is a vector such that →a,→b=|→b| and |�

1.	Let →a=i+2j+3k if →b is a vector such that →a,→b=\|→b\| and \|→a−→b\|=√7, then \|→b\|= ____________
Answer» Let $\to a = i + 2 j + 3 k$ if $\to b$ is a vector such that $\to a, \to b = \| \to b \|$ and $\| \to a - \to b \| = \sqrt{7}$ , then $\| \to b \| =$ ____________