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
<START_INST>Which of the following are convex functions: x^2, x square, 0, sin(x), e^x, sqrt(x), x^-0.5<END_INST><START_CTX><END_CTX><START_A>x^2, x square, 0, e^x<END_A>