When x0, x^2 - exp(x) + 1=?

1. 2
2. 0
3. + infinite
4. 1

A multiple-choice question with one possible answer.(Required)

2.(1 point)When x1, (1-x^4)/(1-x^) =?

1. +infinite
2. 1
3. -1
4. 2
5. 0

A multiple-choice question with one possible answer.(Required)

Tthe derivate of x^2 + ln x =?

1. 2x + exp(x)
2. 2 + ln x
3. X^2 - 1/x
4. 2x + 1/x

A multiple-choice question with one possible answer.(Required)

the second derivate of x^2 + ln x =?

1. 2X^2 - 1/x
2. 2 + 1/ x
3. 2 + exp(x)
4. 2-1/x^2