Question

diketahui
Suku ke-5 = -6
Suku ke-6 = -9
Tentukan Suku ke-10.....
(aritmetika)​

Answer 1

Verified answer

Penjelasan dengan langkah-langkah:

U5 = -6

U6 = -9

U10 = ...

-6 = a + 4b

-9 = a + 5b

_________ -

3 = -b

b = -3

-6 = a + 4 (-3)

-6 = a - 12

-6 + 12 = a

6 = a

U10 = 6 + 9(-3)

U10 = 6 - 27

U10 = -21