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How do you solve #21?

How do you solve #21?-example-1
User Amdg
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5x^3+8x^2/3x^4-16x^2=x^2(5x+8)/x^2(3x^2-16)=5x+8/3x^2-16
lim x--->0 5x+8/3x^2-16=8/-16=-1/2
User Hardik Vaghani
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