Rezolvați ex7!!!!
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Răspuns:
Explicație pas cu pas:
a)(2/3)^n=16/81=2^4/3^4=(2/3)^4 ⇒n=4
b) (3/2)^n=3375/1000=135/40=27/8=(3/2)³ ⇒n=3
c)(1/7)^n=1/343=(1/7)³ ⇒n=3
d)(5/2)^n=125/8=(5/2)³ ⇒n=3