Which of the following are convex functions: x^2, x square, 0, sin(x), e^x, sqrt(x), x^-0.5
x^2, x square, 0, e^x
### Instruction: Which of the following are convex functions: x^2, x square, 0, sin(x), e^x, sqrt(x), x^-0.5
### Context: 
### Answer: x^2, x square, 0, e^x</s>