If `veca and vecb` are non - zero vectors such that `|veca + vecb| = |veca - 2vecb|` then

Options

A. `2a*b=|b|^(2)`
B. `a*b=|b|^(2)`
C. Least value of `a*b+(1)/(|b|^(2)+2)` is `sqrt(2)`
D. Least value of `a*b+(1)/(|b|+2)` is `sqrt(2)-1`

Answer

A, D