Question

Yg tau jawab pake cara yaa

Answer 1

4 + 2 + 1 + 1/2 + ....

a) r = 2/4 = 1/2

b) U₁₂ = a.rⁿ⁻¹
           = (4)(1/2)¹²⁻¹
           = (4)(1/2)¹¹
           = (4)(1/2.048)
           = 1/512

c) S₁₂ = a(1 - rⁿ)/(1 - r)
          = (4)(1 - (1/2)¹²)/(1 - (1/2))
          = (4)(1 - 1/4.096)/(1/2)
          = 8{(4.096 - 1)/4.096}
         = 8(4.095/4096)
         = 4.095/512