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2014-09-09T11:54:39+03:00
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f0g=f(g(x))
deci daca f(x)=3x-4
f0g=2x+3
si notam g(x)=ax+b ⇒
f0g=3(ax+b)-4=2x+3
3ax+3b-4=2x+3
3ax=2x⇒a=2/3
si 
3b-4=3
3b=7⇒b=7/3
atunci
g(x)=2x/3+7/3
4 4 4