hanya 1 pertanyaan tolong dijawab :) no 14 saja
Matematika
Agungfahrizals
Pertanyaan
hanya 1 pertanyaan tolong dijawab :) no 14 saja
1 Jawaban
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1. Jawaban whongaliem
[tex] \lim_{x \to \ 0} \frac{4x}{( \sqrt{1 + 2x}) - ( \sqrt{1 - 2x} } = \lim_{x \to \ 0} \frac{4x [ \sqrt{1 + 2x} + \sqrt{1 - 2x} ]}{( \sqrt{1 + 2x} - \sqrt{1 - 2x})( \sqrt{1 + 2x} + \sqrt{1 - 2x} } [/tex]
[tex]= \lim_{x \to \ 0 } \frac{4x ( \sqrt{1 + 2x} + \sqrt{1 - 2x}) }{1 + 2x - 1 + 2x} [/tex]
[tex]= \lim_{x \to \ 0} \frac{4x ( \sqrt{1 + 2x} + \sqrt{1 - 2x}) }{4x} [/tex]
[tex]= \lim_{x \to \ 0} \sqrt{1 + 2x} + \sqrt{1 - 2x} [/tex]
[tex]= \sqrt{1 + 0} + \sqrt{1 - 0} [/tex]
= √1 + √1
= 1 + 1
= 2 ...... jawaban : A