여기서 어떻게됩니까?

여기서 어떻게됩니까?
Anonim

대답:

# | 죄 (x) | <= 1 "및"arctan (x) / x> = 0 #

설명:

# "As"| 죄 (x) | <= 1 "및"arctan (x) / x> = 0, "우리는"#

# | (sin (1 / sqrt (x)) arctan (x)) / (x sqrt (ln (1 + x))) | <= | arctan (x) / (x sqrt (ln (1 + x))) | #

# (arctan (x) / x와 "sqrt (…)> = 0") "# arctan (x) / (x sqrt (ln (1 + x)

# = arctan (x) / (sqrt (x) sqrt (x ^ -1) x sqrt (ln (1 + x)

# = arctan (x) / (sqrt (x) x sqrt (x ^ -1 ln (1 + x))) #