Question

A=2i+3j; B=2i+j-5k find the magnitude of: i.A+2B and ii.A-5B (Vectors)​​

Answer 1

Answer:

A=2i+3j; B=2i+j-5k find the magnitude of: i.A+2B and ii.A-5B (Vectors)​​

Explanation:

A=2i+3j; B=2i+j-5k find the magnitude of: i.A+2B and ii.A-5B (Vectors)​​

Answer 2

Explanation:

A+2B =6i + 5j- 5k

magnitude A+2B =squr root of 36+25+25

$\sqrt{86}$

A-5B = -8i-2j+25k

$\sqrt{64 + 4 + 25}$

$\sqrt{93}$