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= 4/(√3 + 1)
= 4 x (√3 - 1) /2
= 2 (√3 - 1)
1/akar3+1=akar3-1/akar3-1
akar3-1/2
kll = 4xsisi
kll = 4xakar3-1/2
kll = 2(akar3-1)