O therfucker

• 1.

  Let log(x+1)=f(x). Estimate f(0.1) using differential.

  ①

  1/10ln10

  ②

  1/5ln10

  ③

  3/10ln10

  ④

  2/5ln10

  ⑤

  1/2ln10
• 2.

  Let sin(2f(x))=g(x), f(tanx)=x. What value of g(-2)?

  ①

  4/5

  ②

  2/5

  ③

  0

  ④

  -2/5

  ⑤

  -4/5
• 3.

  Let f(x)=ln(sec(x)+tan(x)). Express sec(x) with the function f(x).

  ①

  sinf(x)

  ②

  tan(x)

  ③

  sinh(f(x))

  ④

  cosh(f(x))

  ⑤

  tanh(f(x))