回答:
#|罪(x)| <= 1、 "and" arctan(x)/ x> = 0#
説明:
# "As" |罪(x)| <= 1 "、" arctan(x)/ x> = 0、 "私たちは持っています"#
#| (sin(1 / sqrt(x))arctan(x))/(x sqrt(ln(1 + x)))| <= | arctan(x)/(x sqrt(ln(1 + x)))|#
#= arctan(x)/(x sqrt(ln(1 + x))) "(arctan(x)/ xと" sqrt(…)> = 0 "の両方)#
#= arctan(x)/(sqrt(x)sqrt(x ^ -1)x sqrt(ln(1 + x)))#
#= arctan(x)/(sqrt(x)x sqrt(x ^ -1 ln(1 + x)))#