lim(x-0)(sin3x*sin5x)/(x^2)_数学解答

lim(x-0)(sin3x*sin5x)/(x^2)

人气：394 ℃　时间：2020-05-16 05:09:37

解答

当 x → 0 时,
lim (sin3x sin5x) / x²
= 15 lim sin3x/(3x) × sin5x /(5x)
= 15 × 1 × 1
= 15