Hayaan ang veca = <- 2,3> at vecb = <- 5, k>. Hanapin ang k kaya na ang veca at vecb ay magiging orthogonal. Hanapin k kaya na a at b ay orthogonal?

Hayaan ang veca = <- 2,3> at vecb = <- 5, k>. Hanapin ang k kaya na ang veca at vecb ay magiging orthogonal. Hanapin k kaya na a at b ay orthogonal?
Anonim

Sagot:

# "Tandaan na, para sa dalawang vectors:" qquad vec {a}, vec {b} qquad "mayroon kami:" #

# qquad vec {a} quad "at" quad vec {b} qquad quad "ay orthogonal" qquad qquad hArr qquad qquad vec {a} cdot vec {b} = 0. #

# "Kaya:" #

# qquad <-2, 3> quad "at" quad <-5, k> qquad quad "ay orthogonal" qquad qquad hArr #

# qquad qquad <-2, 3> cdot <-5, k> = 0 qquad qquad hArr #

# qquad qquad qquad (-2) (-5) + (3) (k) = 0 qquad qquad hArr #

# qquad qquad qquad qquad qquad qquad 10 + 3 k = 0 qquad qquad hArr #

# qquad qquad qquad qquad qquad qquad quad 3 k = -10 qquad qquad hArr #

# qquad qquad qquad qquad qquad qquad quad k = -10/3. #

# "Kaya, mula simula hanggang wakas dito:" #

# qquad <-2, 3> quad "at" quad <-5, k> qquad quad "ay orthogonal" qquad qquad hArr #

# qquad qquad qquad qquad qquad qquad qquad qquad qquad qquad k = -10/3. #

# "Kaya, tapusin namin:" #

# qquad qquad qquad qquad qquad qquad qquad qquad qquad qquad k = -10/3. #