1 . Viết dưới dạng lũy thừa :
25 . 84 =
256 . 1253 =
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a) \(9^3\cdot3^2\)
\(=\left(3^2\right)^3\cdot3^2\)
\(=3^6\cdot3^2\)
\(=3^8\)
b) \(x^7\cdot x:x^4\)
\(=x^8:x^4\)
\(=x^4\)
c) \(7\cdot3^9+3^{10}+51\cdot3^8\)
\(=3^8\cdot\left(7\cdot3+3^2+51\right)\)
\(=3^8\cdot81\)
\(=3^8\cdot3^4\)
\(=3^{12}\)
d) \(5^{15}\cdot125^3\cdot625\)
\(=5^{15}\cdot5^9\cdot5^4\)
\(=5^{28}\)
\(64^3.256^2=\left(4^3\right)^3.\left(4^4\right)^2=4^9.4^8=4^{17}\)
D=64.64.64.256.256 D=8^8.8^8.8^8.16^16.16^16 D=8^8+8+8.16^16+16 D=8^24.16^32
a: \(4^{10}\cdot2^{30}=2^{30}\cdot2^{20}=2^{50}\)
b: \(9^{25}\cdot27^4\cdot81^2=3^{50}\cdot3^{12}\cdot3^8=3^{70}\)
c: \(25^{50}\cdot125^5=5^{100}\cdot5^{15}=5^{115}\)
d: \(64^3\cdot4^8\cdot16^4=4^9\cdot4^8\cdot4^8=4^{25}\)
e: \(2^{10}:8^3=2^{10}:2^9=2\)
\(12^7:6^7=\left(\dfrac{12}{6}\right)^7=2^7\)
f: \(5^8:25^2=5^8:5^4=5^4\)
\(4^9:64^2=4^9:4^6=4^3\)
\(2^{25}:32^4=2^{25}:2^{20}=2^5\)
\(125^3:25^4=5^9:5^8=5\)
g: 2^5*8^4
=2^5*(2^3)^4
=2^5*2^12
=2^17
1=1^2 ;125=5^3 ;-125=-5^3; 27=27^1; -27= -27^1
2: 5^2 25^1
Lời giải:
$4^6.256^2.2^4=(2^2)^6.(2^8)^2.2^4=2^{12}.2^{16}.2^4=2^{12+16+4}=2^{32}$
Bài 1:
Sửa đề: \(4.4.16.2^4=16.16.16=16^3\)
\(6.6.2.3.6=6.6.6.6=6^4\)
Bài 2:
\(9^2.27.3^5=\left(3^2\right)^2.3^3.3^5=3^4.3^3.3^5=3^{12}\)
Sửa đề: \(2^6.b^3.b^2.b=2^6.b^6=\left(2b\right)^6\)
\(100^2.10^5.1000=\left(10^2\right)^2.10^5.10^3=10^4.10^5.10^3=10^{12}\)
Bài 3:
\(3^2.4^3-3^2+333=9.64-9+333=900\)
\(2^5.5^2-3^2-100=32.25-9-100=800-9-100=691\)
\(5^3+6^3+59=125+216+59=400\)
b1;viết cách tích sau dưới dạng lũy thừa
4.4.16.24= 4.4.4.4.4.6=45.6
6.6.2.3.6=6.6.6.6=64
b2;viết kết quả dưới dạng lũy thừa
92. 27 .35= 9.9.9.9.9.9 = 96
25.b3.b2.b= 25 .b6
1.
a) \(3^4\times3^5\times3^6=3^{4+5+6}=3^{15}\)
b) \(5^2\times5^4\times5^5\times25=5^2\times5^4\times5^5\times5^2=5^{2+4+5+2}=5^{13}\)
c) \(10^8\div10^3=10^{8-3}=10^5\)
d) \(a^7\div a^2=a^{7-2}=a^5\)
2.
\(987=900+80+7\\ =9\times100+8\times10+7\\ =9\times10^2+8\times10^1+7\times10^0\)
\(2021=2000+20+1\\ =2\times1000+2\times10+1\times1\\ =2\times10^3+2\times10^1+1\times10^0\)
\(abcde=a\times10000+b\times1000+c\times100+d\times10+e\times1\\ =a\times10^4+b\times10^3+c\times10^2+d\times10^1+e\times10^0\)
25 . (23)4 = 25 . 212 = 217
256 . 1253 = (52)6 . (53)3 = 512 . 59 = 518
hok tốt
25 . (23)4 = 25 . 212 = 217
256 . 1253 = (52)6 . (53)3 = 512 . 59 = 518
hok tốt