If , then is it true that ? Justify your…

MATHEMATICS · Subjective · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

4. If

\vec{a}=\vec{b}+\vec{c}

, then is it true that

|\vec{a}|=|\vec{b}|+|\vec{c}|

? Justify your answer.