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Tentukan turunan fungsi dari: f ( x ) = 3 x 2 − x + 7

Tentukan turunan fungsi dari:

 

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S. Amamah

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

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turunan dari adalah .

turunan dari begin mathsize 14px style f open parentheses x close parentheses equals 3 x squared minus x plus 7 end style adalah begin mathsize 14px style f apostrophe open parentheses x close parentheses equals 6 x minus 1 end style.

Pembahasan

Dengan menerapkan konsep turunan berdasarkan limit fungsi, diperoleh hasil perhitungan sebagai berikut. Dengan demikian, turunan dari adalah .

Dengan menerapkan konsep turunan berdasarkan limit fungsi, diperoleh hasil perhitungan sebagai berikut.

begin mathsize 11px style f apostrophe open parentheses x close parentheses equals limit as h rightwards arrow 0 of space fraction numerator f open parentheses x plus h close parentheses minus f open parentheses x close parentheses over denominator h end fraction equals limit as h rightwards arrow 0 of space fraction numerator open parentheses 3 open parentheses x plus h close parentheses squared minus open parentheses x plus h close parentheses plus 7 close parentheses minus open parentheses 3 x squared minus x plus 7 close parentheses over denominator h end fraction equals limit as h rightwards arrow 0 of space fraction numerator open parentheses 3 open parentheses x squared plus h squared plus 2 x h close parentheses minus open parentheses x plus h close parentheses plus 7 close parentheses minus open parentheses 3 x squared minus x plus 7 close parentheses over denominator h end fraction equals limit as h rightwards arrow 0 of space fraction numerator open parentheses 3 x squared plus 3 h squared plus 6 x h minus x minus h plus 7 close parentheses minus open parentheses 3 x squared minus x plus 7 close parentheses over denominator h end fraction equals limit as h rightwards arrow 0 of space fraction numerator open parentheses up diagonal strike 3 x squared end strike plus 3 h squared plus 6 x h minus down diagonal strike x minus h plus up diagonal strike 7 close parentheses minus open parentheses up diagonal strike 3 x squared end strike minus down diagonal strike x plus up diagonal strike 7 close parentheses over denominator h end fraction equals limit as h rightwards arrow 0 of space fraction numerator 3 h squared plus 6 x h minus h over denominator h end fraction equals limit as h rightwards arrow 0 of space fraction numerator up diagonal strike h open parentheses 3 h plus 6 x minus 1 close parentheses over denominator up diagonal strike h end fraction equals limit as h rightwards arrow 0 of space open parentheses 3 h plus 6 x minus 1 close parentheses equals 3 open parentheses 0 close parentheses plus 6 x minus 1 equals 6 x minus 1 end style 

Dengan demikian, turunan dari begin mathsize 14px style f open parentheses x close parentheses equals 3 x squared minus x plus 7 end style adalah begin mathsize 14px style f apostrophe open parentheses x close parentheses equals 6 x minus 1 end style.

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Berdasarkan ide limit f ( x ) = h → 0 lim ​ [ h f ( x + h ) − f ( x ) ​ ] . Tentukan turunan pertama untuk masing-masing fungsi berikut. f ( x ) = 3 x + 2

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