Pertanyaan

Tentukan nilai limit berikut. x → ∞ lim ( 4 x 2 − 8 x + 7 − ( 2 x − 3 ) )

Tentukan nilai limit berikut.

$x \to \infty lim (4 x^{2} - 8 x + 7 - (2 x - 3))$

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Jawaban terverifikasi

Jawaban

.

limit as x rightwards arrow infinity of open parentheses square root of 4 x squared minus 8 x plus 7 end root minus open parentheses 2 x minus 3 close parentheses close parentheses equals 1

Pembahasan

Jika , maka Maka, hasil limit tersebut: Jadi, .

limit as x rightwards arrow negative infinity of square root of a x squared plus b x plus c end root minus square root of p x squared plus q x plus r end root equals straight L

Jika a equals p , maka $straight L equals fraction numerator b minus q over denominator 2 square root of a end fraction$

Maka, hasil limit tersebut:

$limit as x rightwards arrow infinity thin space of open parentheses square root of 4 x squared minus 8 x plus 7 end root minus open parentheses 2 x minus 3 close parentheses close parentheses equals limit as x rightwards arrow infinity thin space of open parentheses square root of 4 x squared minus 8 x plus 7 end root minus square root of open parentheses 2 x minus 3 close parentheses squared end root close parentheses equals limit as x rightwards arrow infinity thin space of open parentheses square root of 4 x squared minus 8 x plus 7 end root minus square root of 4 x squared minus 12 x plus 9 end root close parentheses equals fraction numerator b minus q over denominator 2 square root of a end fraction equals fraction numerator negative 8 minus left parenthesis negative 12 right parenthesis over denominator 2 square root of 4 end fraction equals fraction numerator 4 over denominator 2 times 2 end fraction equals 4 over 4 equals 1$

Jadi, limit as x rightwards arrow infinity of open parentheses square root of 4 x squared minus 8 x plus 7 end root minus open parentheses 2 x minus 3 close parentheses close parentheses equals 1 .