Berapa jumlah barisan deret ukur dari V2+1/V2+1/2V2….:40 suku
Jawaban Terkonfirmasi
Deret Geometri
√2 + (1/√2) + (1/(2√2)) + … + U40 = S40
a = √2
r = U2/a = (1/√2) / √2 = 1/2
Sn = a(1 – r^n) / (1 – r)
S40 = √2 (1 – (1/2)^40) /(1 – 1/2)
S40 = 2√2 (1 – 2^-40) ✔