If set of values of ‘’ for which is positive for exactly three distinct negative integral values of is , then the value of is equal to |

If set of values of ‘’ for which is positive for exactly three distinct negative integral values of is , then the value of is equal to |

1 Answer

127 votes

**(4)**

Here, roots of the equation are 2 and , and . should be positive for exactly three negative integral values of

Therefore, graph of must be a downward parabola passing through and and

127 votes

127