Question

Ex 12,15,17 va rog frumos repede mâine am mate și nu am fost la ora dau ogramada de puncte

Answer 1

Răspuns:

Explicație pas cu pas:

12

a)2^20/2^21=2^(20-21)=2^(-1)=1/2

b) 3^(34-37)=1/3³              a^m:a^n=a^(m-n)

c) 1  

d)1/6

e)1/7

f)4^(88-91)=1/4³

g)2^(49-3·17)=2^(49-51)=1/4

h)8^25:8^58=8^(-33)=1/8^33

j)3^17

k)3^90:3^91=1/3

i)2^52:2^55=1/8

l)9^28:9^39=1/9^11

15

a)2^20:2^18(1+2)=1/2·3=1/6

b)5^20(5-1)/5^21=4/5

c)3^15(1+3²)/3^18=10/27

d)7^13/7^12(7-1)=7/6

17

a)131313/656565=13·10101/65·10101=13/65=1/5

b)140014/420042=140014/3·140014=1/3

c)70707/616161=7·10101/61·10101=7/61

d)50505/373737=5·10101/37·10101=5/37