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[" 1.If "a=hat i+hat j-2hat k,b=2hat i-h...

[" 1.If "a=hat i+hat j-2hat k,b=2hat i-hat j+hat k" and "c=3hat i-hat k" and "],[c=ma+nb," then "m+n" is equal to "],[[" a."0," b."1],[" c."2," d."-1]]

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