tentukan nilai x agar diperoleh suatu barisan geometri Tolong bantu ka

r = U3÷U2 = U4÷U3
√2 ÷ 2 = (x+1) / (√2+1) ÷√2
√2 ÷ 2 = (x+1)/ (2+√2)
√2 (2+√2) = (x+1).2
2√2 + 2 = 2x+2
2√2 = 2x
x= √2

Rasio = U3/U2 = U2/U1
√2/2 = 1/√2
2/2√2 = 1/√2
RASIO = 1/√2
mis (x+1)/(√2+1) = a
√2/2/a=1/√2
a=√2/2 / 1/√2
a=1
(x+1)/(√2+1)=1
(x+1)-(√2+1)/√2+1=0
x-√2=0
x=√2