Tentukan empat suku awal barisan berikut un = 3n pangkat 2 - 2n + 1

Jawaban

• Jawaban diposting oleh: dayfa74

  Penjelasan dengan langkah-langkah:

  Un = 3n²-2n +1

  U1 = 3(1)²-2(1) +1

  U1 = 3(1)-2 +1

  U1 = 3 -2 +1

  U1 = 2

  U2= 3(2)² -2(2) +1

  U2 = 3(4)-(4) +1

  U2 = 12 -4 +1

  U2 = 9

  U3 = 3(3)² -3(3) +1

  U3 = 3(9)-9 +1

  U3 = 27 -9 +1

  U3 = 19

  U4 = 3(4)² -4(4) +1

  U4 = 3(16) -16 +1

  U4 = 48 -16+1

  U4 = 33

  4 suku awal barisan

  2,9,19,33
• Jawaban diposting oleh: Qieqi9136

  4 suku awal dari barisan A: 1,3,5,7

  U1= 2(1)-1 = 1

  U2= 4-1 = 3

  U3= 6-1 = 5

  U4= 8-1 = 7

  4 suku awal dari barisan B: 6,7,8,9

  U1= 1+5 = 6

  u2= 2+5 = 7

  u3= 3+5 = 8

  u4= 4+5 = 9

  sekian
• Jawaban diposting oleh: echya3

  Jawab: a. U1= 2 x 1 + 1= 3

  U2=2x2 + 1 =5

  U3=2x3 + 1 =7

  U4=2x4 + 1 =9

  b. U1= 3x1 - 4=-1

  U2=3x2 -4=2

  U3=3x3 -4=5

  U4=3x4 -4=8

  c.U1=1+5=6

  U2=2+5=7

  U3=3+5=8

  U4=4+5=9

  Penjelasan dengan langkah-langkah:
• Jawaban diposting oleh: ariffuddin321

  jawaban:

  (E) Un = (n + 2)(n - 3)

  U1 = (1 + 2)(1 - 3) = 3 × (-2) = -6

  U2 = (2 + 2)(2 - 3) = 4 × (-1) = -4

  U3 = (3 + 2)(3 - 3) = 5 × 0 = 0

  U4 = (4 + 2)(4 - 3) = 6 × 1 = 6

  (F) Un = n² + 3n - 4

  U1 = 1² + 3×1 - 4 = 1 + 3 - 4 = 0

  U2 = 2² + 3×2 - 4 = 4 + 6 - 4 = 6

  U3 = 3² + 3×3 - 4 = 9 + 9 - 4 = 14

  U4 = 4² + 3×4 - 4 = 16 + 12 - 4 = 24

  (G) Un = n³ + n

  U1 = 1³ + 1 = 1 + 1 = 2

  U2 = 2³ + 2 = 8 + 2 = 10

  U3 = 3³ + 3 = 27 + 3 = 30

  U4 = 4³ + 4 = 64 + 4 = 68
• Jawaban diposting oleh: Meylandari24

  jawaban:

  1. 13,18,24,31

  3. 33,42,52,63

  semoga membantu kak
• Jawaban diposting oleh: ara28201423

  jawaban:

  A. 1, 3, 5, 7

  B. 6, 7, 8, 9

  Penjelasan dengan langkah-langkah:

  A. Un = 2n - 1

  U1 = 2(1) - 1

  U1 = 2 - 1

  U1 = 1

  U2 = 2(2) - 1

  U2 = 4 - 1

  U2 = 3

  U3 = 2(3) - 1

  U3 = 6 - 1

  U3 = 5

  U4 = 2(4) - 1

  U4 = 8 - 1

  U4 = 7

  B. Un = n + 5

  U1 = 1 + 5

  U1 = 6

  U2 = 2 + 5

  U2 = 7

  U3 = 3 + 5

  U3 = 8

  U4 = 4 + 5

  U4 = 9
• Jawaban diposting oleh: rosaliana6047

  jawaban:

  Hari/Tanggal: Senin, 20 Juli 2020

  Jam: 08.17 WIB

  A] Un = 2n + 1

  • 4 suku awal → 3, 5, 7, 9

  U(1) = 2(1) + 1 = 2 + 1 = 3

  U(2) = 2(2) + 1 = 4 + 1 = 5

  U(3) = 2(3) + 1 = 6 + 1 = 7

  U(4) = 2(4) + 1 = 8 + 1 = 9

  B] Un = 3n - 4

  • 4 suku awal → -1, 2, 5, 8

  U(1) = 3(1) - 4 = 3 - 4 = -1

  U(2) = 3(2) - 4 = 6 - 4 = 2

  U(3) = 3(3) - 4 = 9 - 4 = 5

  U(4) = 3(4) - 4 = 12 - 4 = 8

  C] Un = -2n - 3

  • 4 suku awal → -5, -7, -9, -11

  U(1) = -2(1) - 3 = -2 - 3 = -5

  U(2) = -2(2) - 3 = -4 - 3 = -7

  U(3) = -2(3) - 3 = -6 - 3 = -9

  U(4) = -2(4) - 3 = -8 - 3 = -11

  Semoga Bermanfaat Ya ^^
• Jawaban diposting oleh: nisacchan4227

  jawaban:

  U1 = 2(1) - 3

  = -1

  U2 = 2(2) - 3

  = 1

  U3 = 2(3) - 3

  = 3

  U4 = 2(4) - 3

  = 5
• Jawaban diposting oleh: icut02

  jawaban:

  un = 22n - 3

  U1 = 22.1 - 3

  = 22-3 = 19

  U2 = 22.2 - 3

  = 44 - 3 = 41

  U3 = 22.3 - 3

  = 66 - 3 = 63

  U4 = 22.4 - 3

  = 88 - 3 = 85

  Semoga membantu:)
• Jawaban diposting oleh: QueenTya

  Penjelasan dengan langkah-langkah:

  u1 = (22 x 1) + 11 = 33

  u2 = (22 x 2)+ 11 = 55

  u3 = (22 x 3) + 11 = 77

  u4 = (22 x 4) + 11 = 99

  Jadi empat suku awal barisan adalah 33, 55, 77 dan 99