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\(3^5=3.3.3.3.3\)
\(6^2=6.6\)
\(5^4=5.5.5.5\)
\(2^2=2.2\)
\(7^3=7.7.7\)
cho mik đi
a, \(6^5:6^2=6^{5-2}=6^3\)
b, \(2^3.4=2^3.2^2=2^{3+2}=2^5\)
c, \(5^5:25=5^5:5^2=5^{5-2}=5^3\)
d, \(49^3:7^4=7^6:7^4=7^{6-4}=7^2\)
e, \(a^9:a=a^{9-1}=a^8\)\(\left(a\ne0\right)\)
Chúc bạn học tốt!!!
a,65:62=65-2=63
b,23x4= 25
c,55:25=55:55=1
d,493:74= 72
e, a9:a=a9-1=a8
a,\(4^n.2^n=512\)
\(\Rightarrow2^{2n}.2^n=512\Rightarrow2^{3n}=2^9\Rightarrow3n=9\Rightarrow n=3\)
b,\(3^n+3^{n+3}=252\)( sửa đề )
\(\Rightarrow3^n.\left(1+3^3\right)=252\Rightarrow3^n.28=252\Rightarrow3^n=9\Rightarrow n=2\)
c,\(2.3^{2x+2}=18\)
\(\Rightarrow3^{2n+2}=9\Rightarrow2n+2=2\Rightarrow n=0\)
d,\(x^2=2^3+3^2+4^3\)
\(\Rightarrow x^2=8+9+64\Rightarrow x^2=81\Rightarrow x^2=9^2=\left(-9\right)^2\Rightarrow x=9\)hoặc \(x=-9\)
e,\(x^5=x^9\)
\(\Rightarrow x^9-x^5=0\Rightarrow x^5.\left(x^4-1\right)=0\Rightarrow\hept{\begin{cases}x^5=0\\x^4-1=0\end{cases}\Rightarrow\hept{\begin{cases}x=0\\x=1\\x=-1\end{cases}}}\)
f,\(\left(x-4\right)^3=\left(x-4\right)^{10}\)
\(\Rightarrow\left(x-4\right)^{10}-\left(x-4\right)^3=0\Rightarrow\left(x-3\right)^3.\left[\left(x-3\right)^7-1\right]=0\)
\(\Rightarrow\hept{\begin{cases}\left(x-3\right)^3=0\\\left(x-3\right)^7=1\end{cases}\Rightarrow\hept{\begin{cases}x-3=0\\x-3=1\end{cases}\Rightarrow}\hept{\begin{cases}x=3\\x=4\end{cases}}}\)
\(\frac{-5}{6}< \frac{-3}{4}< \frac{7}{24}< \frac{2}{3}< \frac{7}{8}\)
CHÚC BN HỌC TỐT!!!!
\(5^2.5^3=5^{2+3}=5^5\)
\(9^{10}:9^2=9^{10-2}=9^8\)
\(8^{10}.8^2=8^{10+2}=8^{12}\)
\(5^{2+3}=5^5\)
\(9^{10-2}=9^8\)
\(8^{10+2}=8^{12}\)
Oh , tích mik nha bà con cô bác
1. a) 3^2 .2^2 .2^4 = 3^2. 2^(2+4)=3^2. 2^6
b) 10^2. 10^3.10^5= 10^(2+3+5)= 10^10
c) x.x^5=x^(1+5)=x^6
d) a^3 .a^2 ,a^5= a^(3+2+5)= a^10
2. a) 2^3 và 3^2 . Ta có: 2^3 = 8, 3^2=9 => 2^3 < 3^2
b) 2^4 và 4^2. Ta có: 2^4= 16, 4^2=16 => 2^4 = 4^2
c) 2^5 và 5^2. Ta có: 2^5= 32, 5^2=25 => 2^5 > 5^2
d) 2^100 và 100. => 2^100 > 100
3. a) 3^8:3^4= 3^(8-4)=3^4
b) 10^8:10^2=10^(8-6)=10^2
c) a^6: a (a#0) = a^(6-1)=a^5
a: \(=\dfrac{-28}{36}+\dfrac{15}{36}-\dfrac{26}{36}=\dfrac{-39}{36}=\dfrac{-13}{12}\)
b: \(=\dfrac{11}{9}\left(\dfrac{15}{4}-\dfrac{7}{4}-\dfrac{5}{4}\right)=\dfrac{11}{9}\cdot\dfrac{3}{4}=\dfrac{11}{12}\)
c: \(=15+\dfrac{9}{7}+6+\dfrac{2}{3}-5-\dfrac{5}{9}\)
\(=16+\dfrac{88}{63}=\dfrac{1096}{63}\)
d: \(=\dfrac{5}{6}-\dfrac{1}{3}+\dfrac{2}{18}\)
\(=\dfrac{15-6+2}{18}=\dfrac{11}{18}\)
\(5^2=5.5\) \(4^4=4.4.4.4\)
\(3^9=3.3.3.3.3.3.3.3.3\) \(2^5=2.2.2.2.2\)
\(6^5=6.6.6.6.6\) \(15^2=15.15\)
\(10^3=10.10.10\) \(9^2=9.9\)
cho mik đi
52 = 5 . 5 = 25 44 = 4.4.4.4 = 256
39 = 3.3.3.3.3.3.3.3.3 = 19683 25 = 32
65 = 6.6.6.6.6 = 7776 152 = 15.15 = 225
103 = 10.10.10 = 1000 92 = 9. 9 = 81
mk tk cho bạn rùi, bn tk cho mk nha
ai tốt bụng thì tk cho mk nha, mk đg âm điểm đây huhu