Question

Rapid va rogggggg.Dau coroană​

Answer 1

Răspuns:

Explicație pas cu pas:

a) (2/3)^n=16/81  ⇒(2/3)^n=2^4/3^4  ⇒(2/3)^n=(2/3)^4  ⇒n=4

b) (1/7)^n=1/343  ⇒ (1/7)^n=(1/7)^3  ⇒n=3

c) (1 1/2)^n=3 375/1000  ⇒(3/2)^n=(3375/1000)  ⇒(3/2)^n=(135·25)/1000 ⇒

  (3/2)^n=135/40  ⇒(3/2)^n=27/8  ⇒(3/2)^n=(3/2)^3  ⇒n=3

d) (2 1/2)^n=125/8  ⇒(5/2)^n=(5/3)^3  ⇒n=3