deret aritmatika 3+12+21+ . Tentukan jumlah suku ke-26

The number 10 2/3 converted to a decimal is 10.67. As the hundredths place digit is 7, which is more than 5, we round up the tenths place digit. Therefore, 10 2/3 rounded to the nearest half is 10.7. ;

Answered by Alana1612 | 2024-06-18

10 2/3 can be converted to the decimal 10.67. When rounding to the nearest half, we find that 10.5 is closer than 11.0, so the answer is 10.5. Therefore, 10 2/3 rounded to the nearest half is 10.5.
;

Answered by Alana1612 | 2024-12-17

Penyelesaian[tex]3 + 12 + 21 + \dots[/tex][tex]a = 3[/tex][tex]d = 12 - 3[/tex][tex]= 9[/tex][tex]U_n = a + (n-1)d[/tex][tex]U_{26} = 3 + (26-1) \cdot 9[/tex][tex]= 3 + 225[/tex][tex]= 228[/tex][tex]S_n = \frac{n}{2} \cdot (a + U_n)[/tex][tex]S_{26} = \frac{26}{2} \cdot (3 + 228)[/tex][tex]= 13 \cdot 231[/tex][tex]= 3.003[/tex]suku ke-26 = 3.003

Answered by vinganzbeut | 2025-08-21