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Dimisor
a fost răspuns

derivata :
a) f(x)= 6 arctg x -arcctg x
b) f(x)=-8x+x-12

Răspuns :

Iulica1
[tex]a) f(x)= 6 arctg x -arcctg x \\ f'(x)= \frac{6}{1+ x^{2} }+ \frac{1}{1+ x^{2} } } = \frac{7}{1+ x^{2} } \\ b) f(x)=-8x+x-12 \\ f'(x)=-8+1-12=-7-12=-19[/tex]