Question

Hey!Este posibilitatea ta sa raspunzi si stii bine cine!​

Answer 1

Răspuns:

Explicație pas cu pas:

31

a)(2/3)^x=(2/3)^4     x=4

b)(1/7)^x=2/98=1/49    ⇒x=2

c)(3/2)^x=225/100=9/4       x=2

32

a)(2/5)^2x=(2/5)^6    2x=6      x=3

b)(1/9)^(x+1)=(1/9)^10       x+1=10      x=9

c)(3/7)^(x-3)=(3/7)²     x-3=2       x=5

33

ab:c/d=a/b·d/c

b)7/3·14/10=·7/3·7/5=49/15=3  4/15

c)11/2·4/41=22/41

34

a)3/2

b)5/17

c)7/17

35

25/16·24/15=5·3/2·3=5/2