January 2019 1 49 Report
Wiedząc, że
f(x) = \frac{sinx}{1+cos ^{2} x}

oraz

f`(x) = \frac{cosx(1+acos ^{2}x + bsin ^{2} x }{(1+cos ^{2} x) ^{2} }

Znajdź a i b
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