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Limx→0 [ 1 / (x - 4) + 1 / (x + 4) ] / x

= Limx→0 1 / (x2 - 4x) + 1 / (x2 + 4x)

= Limx→0 (x2 + 4x) / (x4 - 16x2) + (x2 - 4x) / (x4 - 16x2)

= Limx→0 (x2 + 4x - 4x + x2) / (x4 - 16x2)

= Limx→0 2x2 / (x4 - 16x2)

= Limx→0 2 / (x2 - 16)

= 2 / (0 - 16)

= -1/8

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Q: How do you solve the limit as x approaches zero of 1 over x minus 4 plus 1 over x plus 4 all over x?
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