question_answer

The number of real roots of \[{{3}^{2{{x}^{2}}-7x+7}}=9\] is   AIEEE  Solved  Paper-2002

A) zero         

B)           2      

C)           1                                

D)           4

Correct Answer: B

Solution :

                  If the discriminant of  positive, then this equation has two real roots. Given,                                                                    The-discriminant of this equation is positive. Hence, it has two real roots.