Question

The only integral root of the equation $\begin{vmatrix} 2-y &2&3\\\ 2 &5-y &6\\\ 3 & 4 & 10-y \end{vmatrix}$=0 is

• A. y = 1
• B. y = 2
• C. y = 3
• D. none of these

Answer 1

Answer: (A)

y = 1

Answer 2

Clearly $y$ = 1 satisfies it. $[C_3 = 3C_1]$.