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if r satisfies the equation r x (i +2 j+ k)= i-k then for any scalar m , r is eqaul to????? if r satisfies the equation r x (i +2 j+ k)= i-k then for any scalar m , r is eqaul to?????
consider r =ai+bj+ckand solve lhs by using crosss product now get single equations in i,j and kcompare coefficients of i, j and k and u get the desired vector approve if useful
wait …..wait........ what is m ?????
i tried through that only ….but don know what this m...stands for...options for this ques. …a) i+m(i+2j+k)b) j+ m(i+2j+k)c) k+m(i+2j+k)d) i- k +m (i+2j+k)
answer is b)now i understand that what is m when u compare the both sides u does not get exact coeffiicients of r i am solving completely for ulet r=ai+bj+ckon taking cross product and comparing we get a=c , b=2c+1put these values in rwe get r = ci+(2c+1)j+ck r = j + c(i+2j+k)in options they had considered m in place of c APPROVE IF USEFUL
k...i got it...thanx...
my pleasure
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