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[" 102.If "|vec a|=7,|vec b|=11" and "|v...

[" 102.If "|vec a|=7,|vec b|=11" and "|vec a+vec b|=10sqrt(3)],[" then "|vec a-vec b|" is equal to "],[[" (a) "40],[" (b) "10],[" (c) "4sqrt(10)],[" (d) "2sqrt(10)]]

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