MathematicsHard202×since 2002Q5760Let u→,v→,w→\overrightarrow u ,\overrightarrow v ,\overrightarrow wu,v,w be such that ∣u→∣=1, ∣v→∣2, ∣w→∣3.\left| {\overrightarrow u } \right| = 1,\,\,\,\left| {\overrightarrow v } \right|2,\,\,\,\left| {\overrightarrow w } \right|3.u=1,v2,w3. If the projection v→{\overrightarrow v }v along u→{\overrightarrow u }u is equal to that of w→{\overrightarrow w }w along u→{\overrightarrow u }u and v→,{\overrightarrow v },v, w→{\overrightarrow w }w are perpendicular to each other then ∣u→−v→+w→∣\left| {\overrightarrow u - \overrightarrow v + \overrightarrow w } \right|u−v+w equals :A141414B7{\sqrt {7} }7C14{\sqrt {14} }14D222Check answerSkip