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lim (x->0) sin 2x^2 / x^2 + sin^2 3x .......pake cara cepat aja ya...sin coret!!
= 2x² / (x² + (3x)²)
= 2x² / (x² + 9x²)
= 2x² / 10x² .....................x² nya coret
= 2/10
= 1/5