求导 f(x)= 7x^12 - 2x^6 +3x-9

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求导 f(x)= 7x^12 - 2x^6 +3x-9
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求导 f(x)= 7x^12 - 2x^6 +3x-9

求导 f(x)= 7x^12 - 2x^6 +3x-9

求导 f(x)= 7x^12 - 2x^6 +3x-9
f'(x)=12*7x^11-2*6x^5+3-0=84x^11-12x^5+3