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5.5.3.15.25.9 = 5.5.3.3.5.5.5.3.3 = 5^5.3^4
9.21.7.9.49 = 3.3.3.7.7.3.3.7.7 = 3^5.7^4
10.2.5.4.25.10 = 2.5.2.5.2.2.5.5.2.5 = 2^5.5^5
8.4.10.25 = 2.2.2.2.2.2.5.5.5 = 2^6.5^3
515:53 = 515-3 = 512
15.5.9.15.625.81
= 3.5.5.3.3.3.5.5.5.5.5.3.3.3.3 = 3^8.5^6
18.42.7.9.49 = 2.3.3.2.3.7.7.3.3.7.7 =2^2.3^5.7^4
121.2.125.4.25.11
= 11.11.2.5.5.5.2.2.5.5.11 = 11^3.2^3.5^5
36.4.15.75 = 2.3.2.3.2.2.3.5.5.5.3
= 2^4.3^4.5^3
3^7.5^18.15^6 = 3^7.5^18. 3^6.5^6 = 3^13.5^24
Viết lại đề:
a)\(5.5.4.15.25.9\)
b)\(9.21.7.3.49\)
c)\(3^7.5^{18}:15^6\)
d)\(2.4.8.16.32.64...3^9\)
e)\(3.27.243...3^9\)
Bài 2:
a)\(5^x+3< 5^6\)
b)\(\left(3^2\right)^2+2^{x=5}.\left(5+2^2.3\right)\)
Mik chỉ ghi lại đề cho mn dễ giải thui chứ tui lười giải :D
a. \(12^2.3^2.2^3=2^4.3^2.3^2.2^3=2^7.3^4\)
b. \(8^3.3^2.6^3=2^9.3^2.2^3.3^3=2^{12}.3^5\)
c. \(5^{32}.5^2=5^{34}\)
d. \(100^6.2^3=\left(2^2.5^2\right)^6.2^3=2^8.5^8.2^3=2^{11}.5^8\)
e. \(100^2:10^2:5^2=\left(10.5.2\right)^2:10^2:5^2=2^2\)
f. \(121^3-11^2=11^6-11^2=11^2\left(11^4-1\right)\)
a) 75 : ( x - 18 ) = 52 = 25
=> x - 18 = 3
=> x = 21
b) 740 : ( x - 10 ) = 102 - 2 x 13
740 : ( x - 10 ) = 100 - 26 = 74
=> x - 10 = 10
=> x = 20
c) ( 2x - 5 )3 = 8 = 23
=> 2x - 5 = 2
=> 2x = 7
=> x= 7/2
d) ( 15 - 6x ) x 35 = 36
=> ( 15 - 6x ) = 36 : 35 = 3
=> 6x = 12
=> x = 2
A, 2^5 x 8^4 = 2^5 x (2^3)^4 B,25^6 x 125^3=(5^2)^6 x (5^3)^3
= 2^5 x 2^12 =5^12 x 5^9
=2^17 =5^21
a)\(3^2.9^3=9.9^3=9^{1+3}=9^4\)
b)\(2^2.5^2=4.25=100=10^2\)
c)\(8^5.2^3=8^5.8=8^{5+1}=8^6\)
d)\(9^8:3^2=9^8:9=9^{8-1}=9^7\)
a)152*32*53
=152*32*52*5
=152*(3*5)2*5
=152*152*5
=154*5
b)93*32*63*22
=(9*6)3*(3*2)2
=543*62
=(6*9)3*62
=63*93*62
=65*93
c)82*23
=82*8
=83
d)103*23*52
=(2*5)3*23*52
=23*53*23*52
=26*55