MathematicsMedium202×since 2002Q5748Let a,b,ca, b, ca,b,c be three distinct real numbers, none equal to one. If the vectors ai^+j^+k^,i^+bj^+k^a \hat{i}+\hat{\mathrm{j}}+\hat{\mathrm{k}}, \hat{\mathrm{i}}+b \hat{j}+\hat{\mathrm{k}}ai^+j^+k^,i^+bj^+k^ and i^+j^+ck^\hat{\mathrm{i}}+\hat{\mathrm{j}}+c \hat{\mathrm{k}}i^+j^+ck^ are coplanar, then 11−a+11−b+11−c\frac{1}{1-a}+\frac{1}{1-b}+\frac{1}{1-c}1−a1+1−b1+1−c1 is equal to :A−-−2B1C−-−1D2Check answerSkip