If , show that is linear in . Hence, deduce that , where…

MATHEMATICS · Subjective · CBSE · Mathematics · Determinants · Determinants

Problem

If f(x)=∣x+c1x+ax+ax+bx+c2x+ax+bx+bx+c3∣f(x)=\left|\begin{matrix}x+c_1 & x+a & x+a\\ x+b & x+c_2 & x+a\\ x+b & x+b & x+c_3\end{matrix}\right|, show that f(x)f(x) is linear in xx. Hence, deduce that f(0)=bg(a)−ag(b)(b−a)f(0)=\frac{bg(a)-ag(b)}{(b-a)}, where g(x)=(c1−x)(c2−x)(c3−x)g(x)=(c_1-x)(c_2-x)(c_3-x).

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