Question

Tolong bantuin ya pake cara terimakasih

Answer 1

Verified answer

Mapel : Matematika
Kelas : IX SMP
Bab : Barisan dan deret

Pembahasan :
3 , 4 , 7 , 12 , ...

Barisan Aritmatika Tingkat 2
2A = Konstanta
2A = [(U3 - U2) - (U2 - U1)]
2A = [(7 - 4) - (4 - 3)]
2A = [3 - 1]
2A = 2
A = 1

3A + B = Beda
3(1) + B = U2 - U1
3 + B = 4 - 3
B = 1 - 3
B = -2

A + B + C = Suku awal
1 - 2 + C = 3
-1 + C = 3
C = 4

Fungsi Kuadrat Kelas VIII
f(x) = Ax² + Bx + C
Un = An² + Bn + C
Un = n² - 2n + 4

U10 = 10² - 2(10) + 4
U10 = 100 - 20 + 4
U10 = 84