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penyelesaian dalil L,Hospital dgn turunan, didapat ..
lim x-> 2 , (1)(3 +√(x^2 +5))/(-2x)
lim x-> 2, (1)(3+3)/-4
lim x-> 2, 6/-4
lim x-> 2, = -3/2
Note : itu √x^2 +5 adalah satu kesatuan, bukan √x^2 sendiri dan 5 sendiri, tapi √(x^2+5)