pls urgent dau 20 puncte
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Răspuns:
Explicație pas cu pas:
E(x)=(x+5)/(3x-7)+1/(x+5)·(x-5)(x+5)/(3x-7)=(x+5)/(3x-7)+(x-5)/(3x-7)
=(x+5+x-5)/(3x-7)=2x/(3x-7)