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0,6 = 3/a b = 4
a = 3/ 0,6
a = 5
persamaan ellips : x²/a² + y²/b² = 1
x²/25 + y²/16 = 1
c.panjang lotus rectum x = 6 dan panjangnya 7
lotus rectum = L = 2b²/a
x= a/c =