Question

Tolong jawab pertanyaan ini dong

Answer 1

Verified answer

25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63 = 880

jadi jawabannya 19 bulan

Answer 2

5) 3, 12, 21 , .... => a = 3, b = 12 - 3 = 9
Un = 327
a + (n - 1)b = 327
3 + (n - 1)9 = 327
3 + 9n - 9 = 327
9n - 6 = 327
9n = 333
n = 37

6) mungkin pinjam nya sebesar = 880.000 (bukan 880)
a = 25.000
b = 27.000 - 25.000 = 2.000
Sn = 880.000
n/2 (2a + (n - 1)b) = 880.000
n/2 (2(25.000) + (n - 1)(2.000)) = 880.000
n/2 (50.000 + 2.000n - 2.000) = 880.000
n/2 (2.000n + 48.000) = 880.000
1.000n^2 + 24.000n - 880.000 = 0
n^2 + 24n - 880 = 0
(n + 44)(n - 20) = 0
n = -44 atau n = 20
Jadi akan lunas selama 20 bulan