find lim x tends to 0
sin 2x + 3x / 4x - sin 5x

limx0sin2x+3x4x-sin5x=limx0sin2x2x+3x2x4x5x-sin5x5x×2x5x=25limx0sin2x2x+32limx045-sin5x5x=25×1+3245-1=25×-12=-15

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