Kako racionalizirate imenovalec in poenostavite (7sqrt8) / (4sqrt56)?

Kako racionalizirate imenovalec in poenostavite (7sqrt8) / (4sqrt56)?
Anonim

Odgovor:

# sqrt7 / 4 #

Pojasnilo:

# (7sqrt8) / (4sqrt56) xx sqrt56 / sqrt56 #

# = (7sqrt8xx sqrt56) / (4xx56) #

# = (7sqrt (8xx 8xx7)) / (4xx56) #

# = (7 xx 8 sqrt7) / (4xx56) #

# = sqrt7 / 4 #

Odgovor:

# sqrt7 / 4 #

Pojasnilo:

# (7 sqrt 8) / (4 sqrt 56) #

#:. = (7 sqrt (2 * 2 * 2)) / (4 sqrt (14 * 4)) #

# sqrt2 * sqrt2 = 2 #

#:. = (14 sqrt2) / (8 sqrt14) #

#:. = (14 sqrt2) / (8 sqrt14) xx (8 sqrt14) / (8 sqrt14) #

#:. = (prekliče 112 ^ 1 sqrt 28) / prekliči 896 ^ 8 #

#:. = (sqrt 28) / 8 #

#:. = sqrt (2 * 2 * 7) / 8 #

#:. = (2 sqrt 7) / 8 #

#:. = sqrt 7/4 #