张宝珠的回答：
f"(c) = 0f"(x^n) = nx^(x-1)f"(1/x) = -1/x^2f"(√x) = 1/2√xf"(㏑x) = 1/xf"(㏒ax) = 1/x㏑a （a为底）f"(a^x) = a^x * ㏑af"(e^x) = e^xf"(sinx) = cosxf"(cosx) = -sinxf"(tanx) = (sec^2)x = 1/(cos^2)xf"(cotx) = -(csc^2)x = -1/(sin^2)xf"(secx) = cesx * tanxf"(cscx) = -cscx * cotxf"(arcsinx) = 1/√(1-x^2)f"(arccosx) = -1/√(1-x^2)f"(arctanx) = 1/1+x^2
汪琳的回答：
