Jawabanmu

2014-06-09T11:11:07+07:00
a) t,t + 2,t + 6
     (t + 2)/t = (t+6)/(t+2)
     (t+2)² = t(t+6)
     t² + 4t + 4 = t² + 6t
     6t - 4t = 4
           2t = 4
             t = 2
b) t-2,t + 1,3t + 3

     (t+1)/(t-2) = (3t+3)/(t+1)
     (t+1)² = (t-2)(3t+3)
     t² + 2t + 1 = 3t² - 3t -6
     3t²-t²-3t-2t-6-1 = 0
     2t² - 5t - 7 = 0
     (2t-7)(t+1) = 0
       t = 7/2  atau t = -1
3 3 3