4.3+4.2+5.5+4.4=?
Những câu hỏi liên quan
Từ công thức 4.2 và 4.3 hãy suy ra công thức 4.4
Đọc tiếp
Từ công thức 4.2 và 4.3 hãy suy ra công thức 4.4
Ta có: Năng lượng thế tại điểm A là: \(W_{thdA}=-G\cdot\dfrac{M\cdot m}{r_A}\)
Và năng lượng thế tại điểm B là: \(W_{thdB}=-G\cdot\dfrac{M\cdot m}{r_B}\)
Hiệu của hai năng lượng thế là:
\(A_{\overrightarrow{F}}=W_{thdB}-W_{thdA}=-G\cdot\dfrac{M\cdot m}{r_B}-\left(-G\cdot\dfrac{M\cdot m}{r_A}\right)=-G\cdot Mm\cdot\left(\dfrac{1}{r_B}-\dfrac{1}{r_A}\right)\)
\(\Rightarrow-G\cdot M\cdot\left(\dfrac{1}{r_B}-\dfrac{1}{r_A}\right)=\dfrac{A_{\overrightarrow{F}}}{m}\left(1\right)\)
Mặt khác: \(\phi=\dfrac{A_{\overrightarrow{F}}}{m}\left(2\right)\)
Từ \(\left(1\right)\) và \(\left(2\right)\) ta suy ra: \(\phi=-G\cdot M\cdot\left(\dfrac{1}{r_B}-\dfrac{1}{r_A}\right)=-G\cdot\dfrac{M}{r}\)
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Từ công thức 4.2 và 4.3 hãy suy ra công thức 4.4
rút gọn phân số 3^4.2^3-3^4.4/3^5.3^2-3^5.5
Rút gọn phân số sau: 3^4.2^3 - 3^4.4 phần 3^5.3^2- 3^5.5
\(\frac{3^4.2^3-3^4.4}{3^5.3^2-3^5.5}=\frac{3^4.\left(2^3-4\right)}{3^5.\left(3^2-5\right)}=\frac{8-4}{3.\left(9-5\right)}=\frac{4}{3.4}=\frac{1}{3}\)
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\(\frac{3^4\cdot2^3-3^4\cdot4}{3^5.3^2-3^5\cdot5}=\frac{3^4\left(8-4\right)}{3^5\left(9-5\right)}=\frac{4}{3\cdot4}=\frac{1}{3}\)
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\(A=\frac{3^4.2^3-3^4.4}{3^5.3^2-3^5.5}\)
Bài làm:
\(A=\frac{3^4.2^3-3^4.4}{3^5.3^2-3^5.5}\)
\(A=\frac{2^2.3^4\left(2-1\right)}{3^5\left(3^2-5\right)}\)
\(A=\frac{4.1}{3.4}=\frac{1}{3}\)
Bài làm
\(A=\frac{3^4.2^3-3^4.4}{3^5.3^2-3^5.5}=\frac{3^4\left(2^3-4\right)}{3^5\left(3^2-5\right)}\)
\(=\frac{81.2}{243.4}=\frac{81}{243.2}=\frac{81}{486}=\frac{1}{6}\)
\(A=\frac{3^4.2^3-3^4.4}{3^5.3^2-3^5.5}=\frac{3^4.\left(8-4\right)}{3^5.\left(9-5\right)}=\frac{3^4.4}{3^5.4}=3\)3
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2^2.4^4.2^6.2.22.2^3.2^7.2^43^2.33^4.3^3.33.3^5.3^4.3^23.3^6.3^7.3^44.4^34^5.4.4^74.4^3.4^5.4^65.5^65.5^45.5^2.5^45.5^3.5^4.5^65.5^6.5^4.5^3x.x^2x.x^3.x^5a.a^4a.a^2.a^4.a^5.a^7a.a^3.a^5.a^6a^4.a.a^5.a^6.ax.x^3.x^4x^5.x^4.x.x^7.x^67.7^27.7^2.7^4.7^57^3.7^5.7.7^47^2.7.7^6.7^6.7^310.10^210.10^210.100.10^310.100.10^4.100010^2.10^4.100.1000
Đọc tiếp
2^2.4^4.2^6.2.2=
2.2^3.2^7.2^4=
3^2.3=
3^4.3^3.3=
3.3^5.3^4.3^2=
3.3^6.3^7.3^4=
4.4^3=
4^5.4.4^7=
4.4^3.4^5.4^6=
5.5^6
5.5^4=
5.5^2.5^4=
5.5^3.5^4.5^6=
5.5^6.5^4.5^3=
x.x^2
x.x^3.x^5=
a.a^4
a.a^2.a^4.a^5.a^7=
a.a^3.a^5.a^6
a^4.a.a^5.a^6.a=
x.x^3.x^4=
x^5.x^4.x.x^7.x^6=
7.7^2=
7.7^2.7^4.7^5=
7^3.7^5.7.7^4=
7^2.7.7^6.7^6.7^3=
10.10^2=
10.10^2=
10.100.10^3=
10.100.10^4.1000=
10^2.10^4.100.1000=
làm ơn giúp mình ,bạn nào làm nhanh đúng mình chọn cho nhanh nha mọi người
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Bài làm
22.44.26.2.2=22.28.26.22=218
2.23.27.24=215
32.3=33=27
34.33.3=38
3.35.34.32=312
3.36.37.34=318
4.43=44
45.4.47=413
4.43.45.46=415
5.56=57
5.54=55
5.52.54=57
5.53.54.56=514
5.56.54.53=514
x.x2=x3
x.x3.x5=x9
a.a4=a5
a.a2.a4.a5.a7=a19
a.a3.a5.a6=a15
a.a4.a.a5.a6.a=a18
x.x3.x4=x8
x5.x4.x.x7.x6=x23
7.72=73
7.72.74.75=712
73.75.74.7=713
72.7.76.76.73=718
10.102=103
10.100.103=106
10.100.104.1000=1010
102.104.100.1000=1011
Tk nha !
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Cho 2 phân số
\(\dfrac{a}{b}\)=\(\dfrac{3^4.2^3-3^4.4}{3^5.3^2-3^5.5}\)
\(\dfrac{c}{d}\)=\(\dfrac{5^3.7-5^2.2}{5^3.7-5^3.4}\)
Rút gọn và so sánh
phân số thứ 2 ở trên tử số\(5^3\) thành \(5^2\) nha
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\(\dfrac{a}{b}=\dfrac{3^4\cdot2^2\cdot\left(2-1\right)}{3^5\cdot\left(3^2-5\right)}=\dfrac{2^2}{3}\cdot\dfrac{1}{4}=\dfrac{1}{3}\)
\(\dfrac{c}{d}=\dfrac{5^3\left(7-2\right)}{5^3\left(7-4\right)}=\dfrac{5}{3}\)
Do đó: a/b<c/d
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a) 6.3+(-3.7)+2.4+(-0.3)
b)(-4.9)+5.5+4.9+(-5.5)
c)2.9 +3.7+(-4.2)+(-2.9)+4.2
d)(-6.5).2.8+2.8.(-3.5)
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a) 6.3+(-3.7)+2.4+(-0.3)
b)(-4.9)+5.5+4.9+(-5.5)
c)2.9 +3.7+(-4.2)+(-2.9)+4.2
d)(-6.5).2.8+2.8.(-3.5)
a) 6,3 + (-3,7) + 2,4 + (-0,3)
= (6,3 + 2,4) + [-3,7 + (-0,3)]
= 8,7 + (-4)
= 4,7
b) (-4,9) + 5,5 + 4,9 + (-5,5)
= (-4,9 + 4,9) + [5,5 + (-5,5)]
= 0 + 0
= 0
c) 2,9 + 3,7 + (-4,2) + (-2,9) + 4,2
= [2,9 + (-2,9)] + (-4,2 + 4,2) + 3,7
= 0 + 0 + 3,7
= 3,7
d) (-6,5) . 2,8 + 2,8 . (-3,5)
= 2,8 . [-6,5 + (-3,5)]
= 2,8 . (-10)
= -28.
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