1st Grade Math: FrogYogi Practice Workbook

1st Grade Math: FrogYogi Practice Workbook

Matematika Perhatikan barisan bilangan berikut 3, 9, 15, 21,27,.. Tentukan a) Rumus Suku ke-n b) Suku ke, 25 (Un)​

Perhatikan barisan bilangan berikut 3, 9, 15, 21,27,.. Tentukan a) Rumus Suku ke-n b) Suku ke, 25 (Un)​

Penjelasan dengan langkah-langkah:

a = 3

b = 9 - 3 = 6

a. rumus

a (n - 1)b

3 (n - 1)6

3 + 6n - 6

3 - 6 + 6n

= 6n - 3

b. u25

= 6n - 3

= 6(25) - 3

= 150 - 3

= 147

[tex]a)un = a + (n - 1)b \\ b)un = a + (n - 1)b \\ u25 = 3 + (25 - 1)6 \\ = 3 + (24)6 \\ = 3 + 144 \\ = 147[/tex]

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