Nomer 29dan 31 , bantu jawab pake cara ya? Terimakasih ^_^


29)nah karena geometrijadi rasionya yang sama, u2=16=a*r, u5=2=a*r^4, nahkitabagiu5/u2, ar^4/ar=2/16, r^3=1/8akarpangkat tigain, r=1/2, nahu1=16*2=32, u9=32*1/2^8=32/256= 1/8, 30)nah deret aritmatikselisihnya 4 suku awalnya 15, nahkanrumus un=a+(n-1)b, u20=15+(19)4=15+76=91
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29. U, 2082 = ar = 16, U2085 = ar2074 = 2, ar\xb7 r\xb3 = ar2074, 16\xb7 r\xb3 = 2, r\xb3 = 2/16, r\xb3 = 1/8, r =221b1/8 = 1/2, ar = 16, 1/2 a = 16, a = 32, U2089 = ar2078, = 32 (1/2)2078, = 22075 (2207b\xb9)2078, = 22075 (2207b2078), = 2207b\xb3, = 1/2\xb3, = 1/8, 31. AU2081 = 102, Un = 198, b = 3, n = Un – U2081 / b + 1, = 198 -102 / 3 + 1, = 33, Sn = n/2 (U2081 + Un), = 33/2 (102 + 198), = 33/2 (300), = 33 * 150, = 4.950, Kasih penilaian terbaik yaaa 🙂 makasi