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Marcela0
a fost răspuns

va rog am nevoie urgent

Va Rog Am Nevoie Urgent class=

Răspuns :

Iakabcristina2
E(x)=(1-3x+5x)/(1-3x) • (1-3x)^2/[(1-2x)(1+2x)]
E(x)=(1+2x)(1-3x)/(1-2x)(1+2x)
E(x)=(1-3x)/(1-2x)

1-2x#0 <=> 1#2x <=> x#1/2