Download the app

Questions  

 If a is an integer lying in [5,30], then the probability  that the graph of y=x2+2(a+4)x5a+64 is strictly  above the x-axis is 

Remember concepts with our Masterclasses.

80k Users
60 mins Expert Faculty Ask Questions
a
1/6
b
7/36
c
2/9
d
3/5

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is C

x2+2(a+4)x−5a+64≥0 If D≤0, then (a+4)2−(−5a+64)<0OR a2+13a−48<0OR (a+16)(a−3)<0⇒−16


Similar Questions

The odd against an event are 5 to 2 and the odds in favour of another disjoint event are 3 to 5. Then the probability that atleast one of the events will happen is


whats app icon
phone icon