Question

tuliskan lima suku pertama barisan aritmatika yang memenuhi rumus umum berikut A. n² ( n + 1 ) B. n ( n + 1 ) beserta jawabannya​

Answer 1

Jawaban:

a. 2, 12, 36, 80, 150

b. 2, 6, 12, 20, 30

Penjelasan dengan langkah-langkah:

a. n²(n + 1)

u1 = 1²(1 + 1) = 1(2) = 2

u2 = 2²(2 + 1) = 4(3) = 12

u3 = 3²(3 + 1) = 9(4) = 36

u4 = 4²(4 + 1) = 16(5) = 80

u5 = 5²(5 + 1) = 25(6) = 150

b. n(n+1)

u1 = 1 (1 + 1) = 1 × 2 = 2

u2 = 2 (2 + 1) = 2 × 3 = 6

u3 = 3 (3 + 1) = 3 × 4 = 12

u4 = 4 (4 + 1) = 4 × 5 = 20

u5 = 5 (5 + 1) = 5 × 6 = 30