Wat is de inverse van f (x) = 2 ^ x?

Wat is de inverse van f (x) = 2 ^ x?
Anonim

Antwoord:

#color (wit) (xx) f ^ -1 (x) = log_2 x #

Uitleg:

#color (wit) (xx) f (x) = x ^ 2 #

# => Y = kleur (rood) 2 ^ Xcolor (wit) (xxxxxxxxxxx) # (basis is #color (rood) 2 #)

# => x = log_color (rood) 2 ycolor (wit) (xxxxxxxxxxx) #(logaritmische definitie)

# => f ^ -1 (x) = log_2 x #

In # RR ^ 2 #, # F ^ -1 (x) # grafiek moet symmetrisch zijn van #f (x) # graph:

# Y = f (x) #, # Y = x #, en # Y = f ^ -1 (x) # grafieken