Diketahui barisan aritmatika memiliki U2=7 dan U6=9, tentukan suku ke-41

Diketahui barisan aritmatika memiliki U2=7 dan U6=9, tentukan suku ke-41

Jawabannya

26,5

 

Penjelasan dengan langkah-langkah:

b = (U6 – U2) : (6 – 2)

= (9 – 7) : 4

= 2 : 4

= 0,5

a = U1 = U2 – b

= 7 – 0,5

= 6,5

 

Un = a + (n – 1)b

U41 = 6,5 + (41 – 1)1/2

= 6,5 + 40 x 1/2

= 6,5 + 20

= 26,5

 

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Baca Juga :  Every mornIng I 1.____ at five o'clock. First. I go to the 2.____. I 3.____ my teeth and take a bath. After that, I get 4.____ and comb my hair. Then I go to the 5.____. I eat sandwich and a glass of milk for breakfast. Then, I go to 6.____ by my 7.____. I 8.____ at school and then I study. I go 9.____ at one o'clock. I have 10.____ and play with my friends. In The evening, I 11.____ dinner with my family and then we 12.____ watching TV. I do my 13.____. I go to 14.____ at half past nine.