Apa yang berlaku disini?

Apa yang berlaku disini?
Anonim

Jawapan:

# | dosa (x) | <= 1, "dan" arctan (x) / x> = 0 #

Penjelasan:

# "Seperti" | dosa (x) | <= 1 ", dan" arctan (x) / x> = 0, "kita ada" #

# | (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))) "(kedua arktan (x) / x dan" sqrt (…)> = 0 "

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

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