Question

repdeee pas cu pas Dau coroaaaaannnnnaaa

Answer 1

5.a)
2^12÷2^a=2^5 (a apartine R)
2 la -a+12 =2^5
-a+12=5
-a=5-12 => -a=-7 se inmulteste cu (-1) ca sa se scape de semnul minus
a=7

b) 3^2×3^4÷3^b=3 (b apartine R)
3 la -b+6 =3^1
-b+6=1 => -b=1-6
-b=-5 /×(-1)
b=5

c) 7^24=(7^a)^b
d)5^5÷(5^b ×5^a)=5^3
(5^b×5^a)=5^8

6a)[(2^8)^3 ÷(2^6+2^6)÷8-8^6÷4^5÷16]÷2^12+12
(2^24÷(2×2^6)÷2^3-2^18+(2^2)^5÷2^4)÷2^12+2
(2^24÷2^7÷2^3-2^18÷2^10÷2^4)÷2^12+2
(2^14-2^4)÷2^12+2
(2^10 -1)×2^4 ÷2^12+2
(1024-1)×16 ÷2^12 +2
1023×16÷2^12 +2
16368÷2^12 +2=16368 pe 2^12 +2
16368/4096 +2=1535/256

b)3^46÷(9^22+3^20×27^8+9^30÷81^4)-2^23÷(2^22+2^22)
=3^46÷(3^44+3^20 ×(3^3)^8 +3^60÷(3^4)^4)-2^23÷(2×2^22)
=3^46÷(3^44+3^20×3^24+3^60÷3^16)-2^23÷2^23
=3^46÷(3^44 +3^44 +3^44)-1
=3^46÷(2×3^44 +3^44)-1
=3^46÷(3×3^44)-1
=3^46÷3^45-1
=3-1=2
a>b