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2(4-√3)/16-3
2(4-√3)/13
8-2√3/13(C)
9. Un=2n
U10=2.10
=20(C)
10.r pangkat 5-1 = 80/5
r pangkat 4 = 16
r = akar pangkat 4 dari 16
r = 2
U9 = a.r pangkat n-1
= 5.2 pangkat 9-1
= 5. 2 pangkat 8
= 5.256
=1280(D)
11. Anak 1 = 48 lembar
Anak 2 = 1/2.48 lembar = 24 lembar
Anak 3 = 1/2.24 lembar = 12 lembar
Anak 4 = 1/2.12 lembar = 6 lembar
Anak 5 = 1/2.6 lembar = 3 lembar
----------------------------------------------------------- +
Total uang = 93x Rp.2000, = Rp 186.000,(D)
12.Misal nastar=x
keju =y
x=2y
3x+2y=480
3(2y)+2y=480
6y+2y = 480
8y = 480
y = 60.000
x = 2y = 2.60 = 120.000
2x+3y= 2(120)+3(60)
= 240+180
= Rp.420.000(B)
Jadi, harga 2 kaleng kue nastar dan 3 kaleng kue keju adalah Rp.420.000
Jadikan jawaban terbaik ya....:v