Wat is de limiet wanneer t 0 nadert van tan8t? / Tan5t

Wat is de limiet wanneer t 0 nadert van tan8t? / Tan5t
Anonim

Antwoord:

#Lt (t-> 0) (tan8t) / (tan5t) = 8/5 #

Uitleg:

Laten we eerst zoeken #Lt_ (x-> 0) tanx / x #

#Lt_ (x-> 0) tanx / x = Lt_ (x-> 0) (SiNx) / (xcosx) #

= #Lt_ (x-> 0) (sinx) / x xx Lt_ (x-> 0) 1 / cosx #

= # 1xx1 = 1 #

Vandaar #Lt_ (t-> 0) (tan8t) / (tan5t) #

= #Lt_ (t-> 0) ((tan8t) / (8t)) / ((tan5t) / (5T)) xx (8t) / (5T) #

= # (Lt_ (8t-> 0) ((tan8t) / (8t))) / (Lt_ (5t-> 0) ((tan5t) / (5T))) xx8 / 5 #

= # 1 / 1xx8 / 5 = 8/5 #