Question

If A=2i+4j & B= 2i-5j then the value of A+B will be? ​

Answer 1

The value of A + B will be :-

A + B = 2i + 4j + 2i - 5j

= 4i -j

And its magnitude can be calculated by:-

$\sqrt{ {x}^{2} + {y}^{2} } \\ \\ = \sqrt{ {4}^{2} + {1}^{2} } \\ \\ = \sqrt{17}$
Hope it helps.

Answer 2

A + B = 2i + 4j + 2i - 5j  = 4i -j  And its magnitude can be calculated by:-   \sqrt{ {x}^{2}  +  {y}^{2} }   \\  \\  =  \sqrt{ {4}^{2}  +  {1}^{2} }  \\  \\  =  \sqrt{17}