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TS EAMCET · Maths · Determinants

If \(a \neq b \neq c, \Delta_1=\left|\begin{array}{lll}1 & a^2 & b c \\ 1 & b^2 & c a \\ 1 & c^2 & a b\end{array}\right|, \Delta_2=\left|\begin{array}{ccc}1 & 1 & 1 \\ a^2 & b^2 & c^2 \\ a^3 & b^3 & c^3\end{array}\right|\) and \(\frac{\Delta_1}{\Delta_2}=\frac{6}{11}\), then \(11(a+b+c)=\)

  1. A 0
  2. B 1
  3. C \(a b+b c+c a\)
  4. D \(6(a b+b c+c a)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(6(a b+b c+c a)\)

Step-by-step Solution

Detailed explanation

\(\Delta_1=\left|\begin{array}{ccc}1 & a^2 & b c \\ 1 & b^2 & c a \\ 1 & c^2 & a b\end{array}\right|\) \(\text {Applying } R_2 \rightarrow R_2-R_1 ; R_3 \rightarrow R_3-R_1\)…