1.

If A = i-2j +3k.B=41+4j-4k andC-5-8jt9k then A+ B+0 is

Answer»

A+B+C = i(1+4+5) +j(-2+4-8) +(3-4+9)k = 10i-6j+8k|A+B+C|= √(10)²+(-6)²+(8)² = √200 = 10√2



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