100 No-Equipment Workouts Vol. 2: Easy to Follow Home Workout Routines with Visual Guides for All Fi

100 No-Equipment Workouts Vol. 2: Easy to Follow Home Workout Routines with Visual Guides for All Fi

Matematika Jika a = 5i + 5j, b = 4i-5j, dan =41 +5j, tentukan setiap vektor berikut.
a. a + b
b. b - c
c. b +c
d. 3a - c
e. a + (b - 2c)​

Jika a = 5i + 5j, b = 4i-5j, dan =41 +5j, tentukan setiap vektor berikut.
a. a + b
b. b - c
c. b +c
d. 3a - c
e. a + (b - 2c)​

Penjelasan dengan langkah-langkah:

Diketahui :

a = 5i + 5j

b = 4i - 5j

c = 4i + 5j

Dicari :

a.) a + b = (5i + 5j) + (4i - 5j)

a + b = ( 9i )

b.) b - c = (4i - 5j) - (4i + 5j)

b - c = ( -10j )

c.) b + c = (4i - 5j) + (4i + 5j)

b + c = ( 8i )

d.) 3a - c = 3(5i + 5j) - (4i + 5j)

3a - c = (15i + 15j) - (4i + 5j)

3a - c = (11i + 10j)

e.) (a+(b-2c)) = ((5i + 5j) + ((4i - 5j) - 2(4i + 5j)))

(a+(b-2c)) = ((5i + 5j) + ((4i - 5j) - (8i + 10j)))

(a+(b-2c)) = ((5i + 5j) + (-4i -15j))

(a+(b-2c)) = ( i - 10j)

Semoga membantu dan dapat bermanfaat ya terimakasih

Jawaban:

a. 9i

b. -10j

c. 8i

d. 11i + 10j

e. i - 10j

Penjelasan dengan langkah-langkah:

a. a + b = (5i + 5j) + (4i - 5j)

= 9i

b. b - c = (4i - 5j) - (4i + 5j)

= -10j

c. b + c = (4i - 5j) + (4i + 5j)

= 8i

d. 3a - c = 3(5i + 5j) - (4i + 5j)

= (15i + 15j) - (4i + 5j)

= 11i + 10j

e. a + (b - 2c) = (5i + 5j) + [(4i - 5j) - 2(4i + 5j)]

= (5i + 5j) + [(4i - 5j) - (8i + 10j)]

= (5i + 5j) + (-4i - 15j)

= i - 10j

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