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a, 410. 230=220.230=250
b,925.274.813= 350.312.312=374
Tương tự các câu khác....
a, 410.230 = (22)10.230 = 220.230 = 250
b, 925.274.813 = (32)25.(33)4.(34)3 = 350.312.312 = 374
c, 2550.1255 = (52)50.(53)5 = 5100.515 = 5115
d, 643.48.164 = (26)3.(22)8.(24)4 = 218.216.216 = 250
e, 38 : 36 = 32
210 : 83 = 210 : (23)3 = 210 : 29 = 2
127 : 67 = (12 : 6)7 = 27
@Dương Tuyết Mai
\(9^{12}.27^5.81^4=\left(3^2\right)^{12}.\left(3^3\right)^5.\left(3^4\right)^4\)
\(=3^{24}.3^{15}.3^{16}\)
\(=3^{55}\)
\(64^3.4^5.16^2=\left(4^3\right)^3.4^5.\left(4^2\right)^2=4^{18}\)
\(25^{20}.125^4=\left(5^2\right)^{20}.\left(5^3\right)^4=5^{52}\)
\(x^7.x^4.x^3=x^{14}\)
\(3^6.4^6=\left(3.4\right)^6=12^6\)
\(8^4.2^3.16^2=\left(2^3\right)^4.2^3.\left(2^4\right)^2=2^{23}\)
\(2^3.2^2.\left(2^3\right)^3=2^{14}\)
Tính :
a, 3^8 : 3^6 ; 2^10 : 8^3 ; 12^7 : 6^7 ; 21^5 : 81^3
b, 5^8 : 25^2 ; 4^9 : 64^2 ; 2^25 : 32^4
a) 38 : 36 = 32;
210 : 83 = 210 : 29 = 2;
127 : 67 = 214. 37 : 27. 37 = (214 : 27). (37 : 37) = 27;
215 : 813 = 35. 75 : 312 = 3-7. 75;
b) 58 : 252 = 58 : 54 = 54;
49 : 642 = 218 : 212 = 26;
225 : 324 = 225 : 220 = 25
Thấy đúng thì cho mình đúng nha!!! Cảm ơn các bạn!!!
Bài 1: Tính
a) 38 : 36 b) 210 : 83 c) 127 : 67 d) 215 : 813 e) 58 : 252 g) 49 : 642 h) 225 : 324
= 6561: 729 = 1024: 512 = 35831808 : 279936 = 4084101:531441 = 390625 : 625 = 262144: 4096 = 33554432: 1048576
= 9 = 2 = 128 = 7. 684956561 = 625 = 64 = 32
= 7,68
\(2^5.8^4=2^5.\left(2^3\right)^4=2^5.2^{12}=2^{17}\)
\(25^6.125^3=\left(5^2\right)^6.\left(5^3\right)^3=5^{12}.5^9=5^{21}\)
1- 2x2x2x2x2
2-8x8x8x8
3- 25x25x25x25x25x25
4- 125x125x125
a) 256. 1253
= (52)6. (53)3
= 512. 56
= 512+6
= 518
b) 6255: 257
= (54)5: (52)7
= 520: 514
=520-14
=56
c) 123.33
= (12.3)3
=363 (=66)
a) \(25^6.125^3=\left(5^2\right)^6.\left(5^3\right)^3=5^{12}.5^9=5^{21}\)
b) \(625^5:25^7=\left(5^4\right)^5:\left(5^2\right)^7=5^{20}:5^{14}=5^6\)
c) \(12^3.3^3=\left(12.3\right)^3=36^3\)
Nữ hoàng cảm ơn nhưng vị thám tử tài ba có thể viết cách giải ra đc không ạ
a) $3^8:3^6=3^{8-6}=3^2$
$19^7:19^3=19^{7-3}=19^4$
$2^{10}:8^3=2^{10}:(2^3)^3=2^{10}:2^9=2^{10-9}=2^1$
$12^7:6^7=(12:6)^7=2^7$
$27^5:81^3=(3^3)^5:(3^4)^3=3^{15}:3^{12}=3^{15-12}=3^3$
b) $10^6:10=10^{6-1}=10^5$
$5^8:25^2=5^8:(5^2)^2=5^8:5^4=5^{8-4}=5^4$
$4^9:64^2=4^9:(4^3)^2=4^9:4^6=4^{9-6}=4^3$
$2^25:32^4=2^{25}:(2^5)^4=2^{25}:2^{20}=2^{25-20}=2^5$
$18^3:9^3=(18:9)^3=2^3$
\(\cdot3^8:3^6=3^{8-6}=3^2\)
\(\cdot19^7:19^3=19^{7-3}=19^4\)
\(\cdot2^{10}:8^3=2^{10}:\left(2^3\right)^3=2^{10}:2^9=2\)
\(\cdot12^7:6^7=\left(12:6\right)^7=2^7\)
\(\cdot27^5:81^3=\left(3^3\right)^5:\left(3^4\right)^3=3^{15}:3^{12}=3^3\)
\(\cdot10^6:10=10^{6-1}=10^5\)
\(\cdot5^8:25^2=5^8:\left(5^2\right)^2=5^8:5^4=5^4\)
\(\cdot4^9:64^2=4^9:\left(4^3\right)^2=4^9:4^6=4^3\)
\(2^{25}:32^4=2^{25}:\left(2^5\right)^4=2^{25}:2^{20}=2^5\)
\(18^3:9^3=\left(18:9\right)^3=2^3\)