If $\Delta=\left|\begin{array}{ccc}x^n & x^{n+2} & x^{2 n} \\ 1 & x^p & p \\ x^{n+5} & x^{p+6} & x^{2 n+5}\end{array}\right|=0$, then P is given by
Answer & explanation
Correct answer: option 4
C1 and C3 become equal for p = xn
and R1 and R3 become equal for p = n + 1.
Hence (4) is the correct answer.