demak, f’(x) = (x3)’ = 3x2
3 – m i s o l. F(x) = c funksiyaning hosilasini toping, bunda s –biror berilgan son
Y e c h i s h. 1) f (x) = c, 2) f(x+Δx) = c;
3) Δf = f(x+Δx) – f(x) = c –c = 0
4)  =  = 0; 5) 
Demak, ( c )’= 0, ya’ni har qanday o’zgarmas sonning hosilasi 0ga teng.
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