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x³ - 8 / x² - 2x
turunkan
3x² / 2x - 2
masukkan nilai 2
3(2)² / 2(2) - 2
= 3(4) / (4 - 2)
= 12 / 2
= 6
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Limit x mendekati tak hingga
(4 + 5x)(2 - x) / (2 + x)(1 - x)
= (8 -4x + 10x -5x²) / (2 - 2x + x - x²)
= (-5x² + 6x + 8) / (-x² - x + 2)
bagi masing-masing konstanta dengan x pangkat terbesar
= (-5x²/x² + 6x/x² + 8/x²) / (-x²/x² - x/x² + 2/x²)
= (-5 + 0 + 0) / (-1 - 0 + 0)
= -5 / -1
= 5