100 Facts Penguins- Arctic Birds, Cold Climate Wildlife, Educational Projects, Fun Activities,

100 Facts Penguins- Arctic Birds, Cold Climate Wildlife, Educational Projects, Fun Activities,

Matematika tentukan nilai suku pertama beda / rasio dan suku ke 10
a. 5,8,11.....
b. 2,-4,8,-16​

tentukan nilai suku pertama beda / rasio dan suku ke 10
a. 5,8,11.....
b. 2,-4,8,-16​

Penjelasan dengan langkah-langkah:

a. 5, 8, 11, ...

Suku pertama (a) = 5

beda = 3

Suku ke -10 :

U10 = 5 + (10-1)×3

U10 = 5 + 9×3

U10 = 5 + 27

U10 = 32

b. 2, -4, 8, -16, ...

Suku pertama (a) = 2

Ratio = -2

Suku ke -10 :

U10 = 2 × (-2)^10-1

U10 = 2 × (-2)⁹

U10 = 2 × (-512)

U10 = - 1024