A) 10
B) 7
C) 6
D) 12
Correct Answer: B
Solution :
(b): For real roots, \[{{b}^{2}}-4ac\ge 0\] \[\Rightarrow {{b}^{2}}-4ac\ge 0\Rightarrow {{b}^{2}}\ge 4a\] For a = 1; can take values 2, 3, 4 \[\therefore \]Admissible pairs are (1, 2) (1, 3) (1, 4) Similarly other ADMISSIBLE PAIRS are: (2, 3), (2, 4), (3, 4), (4, 4) Hence total seven pairs \[\Rightarrow \] seven eqns.You need to login to perform this action.
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