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=1
=6
=143
mik ko biết làm câu so sánh làm giúp mik đi mik trả k lại nhoa
nhớ k mik
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1)5x+1 + 6.5x+1 = 875
5x+1 ( 1+6 ) = 875
5x+1 . 7 = 875
5x+1 = 875 : 7
5x+1 = 125
5x+1 = 53
x+1 = 3
x = 3 - 1
x = 2
2)3x+1 + 3x+3 = 810
3x . 3 + 32 . 3x+1 = 810
3x . 3 + 9 . 3x . 3 = 810
3x .3 ( 1 + 9 ) = 810
3x+1 . 10 = 810
3x+1 = 810 : 10
3x+1 = 81
3x+1 = 34
x+1 = 4
x = 4-1
x = 3
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1/51+1/52+1/53+....+1/100>1/100+1/100+1/100+...+1/100(50 so 0)=50/100=1/2
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\(\frac{2323}{9999}=\frac{2323:101}{9999:101}=\frac{23}{99}\)(1)
\(\frac{232323}{999999}=\frac{232323:10101}{999999:10101}=\frac{23}{99}\)(2)
Từ (1) và (2) =>\(\frac{23}{99}=\frac{2323}{9999}=\frac{232323}{999999}\)
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Lời giải:
a. $2^3.8=2^3.2^3=2^6$
b. $5^2.25=5^2.5^2=5^4$
c. $27:3^2=3^3:3^2=3^1$
d. $4^2.16=4^2.4^2=4^4$
e. $5^3.5^6=5^9$
f. $3^4.3=3^5$
g.$3^5.4^5=(3.4)^5=12^5$
h. $8^5.2^3=(2^3)^5.2^3=2^{15}.2^3=2^{18}$
i. $a^3.a^5=a^8$
j. $x^7.x.x^4=x^{7+1+4}=x^{12}$
k. $5^6:5^3=5^3$
l. $3^{15}:3^3=3^{15-3}=3^{12}$
m. $4^6:4^6=4^0=1$
n. $9^8:3^2=(3^2)^8:3^2=3^{16}:3^2=3^{14}$
o. $a:a=a^0=1$
p. $5^8.5.5^2=5^{8+1+2}=5^{11}$
q. $4.4^3=4^4$
r. $3.3^4=3^5$
s. $36.6^5=6^2.6^5=6^7$
t. $2^5.2^3=2^8$
u. $3^{10}:3^3=3^7$
v. $2^{10}:2^3=2^7$
w. $5^8:25=5^8:5^2=5^6$
x. $16:2^3=2^4:2^3=2^1$
y. $4.2^3=2^2.2^3=2^5$
z. $2^{10}:4=2^{10}:2^2=2^8$