Which of the following is an even function?
g(x) = (x – 1)2 + 1
g(x) = 2x2 + 1
g(x) = 4x + 2
g(x) = 2x

Hence, the function which is even is:

Step-by-step explanation:

We have to find which of the given functions is even.

We know that a function f(x) is even if:

1)

Now,

Hence, option 1 is false.

2)

Now,

Hence, option 2 is true.

3)

on on replacing x by -x we have:

Hence, option 3 is incorrect.

4)

on putting x=-x we have:

hence, option 4 is incorrect.

Hence, the function which is even is:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870