Question

A vector=4i-3j+k and B vector = -i+j+4k find A-B

Answer 1

Explanation:

• LET |A-B| = x
• squaring on both sides
• (|A-B|)^2 = x^2
• MOD A SQUARE PLUS MOD B SUARE MINUS TWO TIMES THE SCALAR PRODUCT OF VECTORS A AND B
• MOD A =
• $\sqrt{26}$
• mod B=
• $\sqrt{18}$
• A VECTOR DOT B VECTOR EUQALS
• $4 \times ( - 1) + ( - 3) \times 1 + 1 \times 4$
• that equals -3
• on solving we get
• ${ \sqrt{26 } }^{2} + { \sqrt{18} }^{2} - 2 \times ( - 3)$
• = 50
• |A-B| = √50 = 5√2

Answer 2

Explanation:

hope it helps u chackare