1. 3√24 × 5√6 adalah . . . 2. Dani menyimpan uang di bank Rp2.000.000,00. Bank memberikan bunga 1,5% per bulan. Jika uang dani menjadi Rp2.720.000,00, berarti D

1. 3√24 x 5√6 = 3x5x√24x6 = 15 x √144 = 15 x 12 = 180

2. Rp. 720.000 = Rp. 2.000.000 x 1,5/100 x n
720 = 30n
n = 720/30 = 24 bulan = 2 tahun

3. U1 = -104
b1 = -98 - (-104) = 104-98 = 6
b2 = -86 -(-98) = 98-86 = 12
s1 = 12-6 = 6

2a = 6
a = 3
3a + b = 6
b = 6 -9 = -3
a + b + c = -104
3 - 3 + c = -104
c = -104

Un = 3n² - 3n -104
U20 = 3(20)² - 3(20)-104 = 1.200 - 164 = 1.036

U25 = 3(25)² - 3(25) - 104 = 1.875 - 179 = 1.696

U20 + U25 = 1.036 + 1.696 = 2.732