Question

if a =root x b=4 root 20.a>b, then the least value of x€N is
a) 3
b) 4
c) 5
d) 6​

Answer 1

Answer:

ANSWER

If a,b are the roots of the equation x  

2

+ax+b=0,

Then a+b=−a⇒b=−2a and ab=b⇒a=1

Hence, b=−2

So, the quadratic equation =x  

2

+x−2

The minimum value of the function exists at x=−  

2

1

​  

 

The least value is (−  

2

1

​  

)  

2

−  

2

1

​  

−2=−  

4

9

​

Step-by-step explanation:

Answer 2

Answer:Given the constants of quadratic equation F(x) = Ax 2 + Bx + C as A, B, and C and an integer K, the task is to find the smallest value of root x such that F(x) ≥ K.If no such values exist then print “-1.

Step-by-step explanation: