KVPY SX SB Exam 2012 Question Paper

© examsiri.com

Question : 9 of 120

Marks: +1, -0

The mid-point of the domain of the function

f(x)=√{4-√{2x+5}}

for real x is

$1/4$
$3/2$
$2/3$
$-2/5$

Solution:

f(x)=√{4-√{2x+5}}

4-√{2x+5} ≥ 0,

2x+5 ≥ 0

√{2x+5} ≤ 4

,

x≥ -5/2

x ≤ 11/2

x ∈ [-5/2,11/2]

mid point

={-5/2+11/2}/2=3/2

© examsiri.com

Go to Question:

Prev Question

Next Question