Question

Dalam geometri 3/8+3/4+3/2+..+24 berapa n

Answer 1

 3/8+3/4+3/2+..+24  -----> a = 3/8  ; r = 2  ; Un = 24
Un = a.r^(n - 1)
24  = (3/8). 2^(n - 1)
2^(n - 1) = 24 : 3/8
2^(n - 1) = 24 x 8/3
2^(n - 1) = 64
2^(n - 1) = 2^6
    n - 1  = 6
          n = 6 + 1
          n = 7
       

Answer 2