Let a→,b→ and c→ be three units vectors such that 3a→+4b→+5c→=0 Then which of the following statements is true?
a→ is parallel to b→
a→ is perpendicular to b→
a→ is neither parallel nor perpendicular to b→
none of these
3a→+4b→+5c→=0
Hence, a→,b→ and c→ are coplanar.
No other conclusion can be derived from it.