Question

Which of the following satisfy f(x) >1 for all real values of x ?
A) f(x)=x^2+2
B)f(x)=2sinx-2
C)f(x)=x^2-2
D)f(x)=|x+2|

Answer 1

@AbhimanyuPudi

Answer 2

i think A

Answer 3

@gerryliyana Well My questions do not actually need answers :)

Answer 4

Explanation Please.

Answer 5

put whatever u want the value of x on f(x)=x^2+2, You will always get a f(x) >1

Answer 6

A) x^2 is always >= 0
So, x^2+2 >= 2
If the values are greater than or equal to 2, then they are surely greater than 1, right?

Answer 7

because there is quadratic that always positive and "+2" that always provide the value more than 1

Answer 8

Ok Thanks Alot.

Answer 9

welcome : )

Answer 10

welcome :)