Question

if A =2i+3j+4k and i+4j+5k . find the magnitude of A+B.​

Answer 1

given A=2i+3j+4k

magnitude of A=√(2^2+3^2+4^2)

=√(4+9+16)

=√29

B=i+4j+5k

magnitude of B=√(1^2+4^2+5^2)

=√(1+16+25)

=√42

A+B=√29+√42