What is #|| <1, 9, 7 > - < 4, -2, -9 >||#?

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What is #|| <1, 9, 7 > - < 4, -2, -9 >||#?

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Answer 1 · 2016-02-15T09:51:17

#|A|=sqrt 386#

Explanation:

#"step 1:"#
#"find : "<1,9,7> - <4,-2,-9>#
#<1-4,9+2,7+9>#
#<-3,11,16>#
#"step 2:"#
#"find magnitude of vector : "#
#|A|=sqrt ((-3)^2+11^2+16^2)#
#|A|=sqrt (9+121+256)#
#|A|=sqrt 386#

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What is #|| <1, 9, 7 > - < 4, -2, -9 >||#?

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