100 Ways to Be As Happy As Your Dog

100 Ways to Be As Happy As Your Dog

Matematika
[tex]jika \: f \: (x) = {x}^{2} + 2x \\ maka \: nilai \: dari \: \\lim_{x > 2} \frac{f(x) - f(2)}{3 {x}^{2} - 12} [/tex]
jawab soal matematika di atas ?​


[tex]jika \: f \: (x) = {x}^{2} + 2x \\ maka \: nilai \: dari \: \\lim_{x > 2} \frac{f(x) - f(2)}{3 {x}^{2} - 12} [/tex]
jawab soal matematika di atas ?​

Penjelasan dengan langkah-langkah:

Jika f(x) = x² + 2x

.

lim x → 2

= { f(x) - f(2) }/{ 3x² - 12 }

= { (x² + 2x) - (x² + 2x) }/{ 3x² - 12 }

= { x² + 2x - (2² + 2(2) }/{ 3x² - 12 }

= { x² + 2x - (4 + 4)}/{ 3x² - 12}

= { x² + 2x - 8 }/{ 3(x² - 4) }

= { (x + 4)(x - 2) }/{ 3(x + 2)(x - 2) }

= { (x + 4) }/{ 3(x + 2) }

= (2 + 4)/(3(2 + 2))

= 6/3(4)

= 6/12

= ⁶(1)/⁶(2)

= ½

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