Question

Jumlah deret geometri tak hingga 1/2+1/3+2/9+.. adalah ..

Answer 1

A = 1/2
r = U2/U1 = 1/3 : 1/2
 r = 1/3 x 2/1 = 2/3
S = a/ (1-r)
 = 1/2 / (1-2/3)
= 1/2 / 1/3
= 1/2 x 3/1
= 3/2

Answer 2

A = 1/2
r = 1/3 / 1/2
  = 2/3
s tak hingga = a/(1-r)
                   = 1/2 /(1-2/3)
                   = 1/2 / 1/3
                   = 3/2