Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{14^{16}.21^{32}.35^{48}}{10^{16}.15^{32}.7^{96}}=\frac{2^{16}.7^{16}.3^{32}.7^{32}.5^{48}.7^{48}}{2^{16}.5^{16}.3^{32}.5^{32}.7^{96}}\)
\(=\frac{2^{16}.\left(7^{16}.7^{32}.7^{48}\right).5^{48}.3^{32}}{2^{16}\left(5^{16}.5^{32}\right).3^{32}.7^{96}}=\frac{2^{16}.7^{96}.5^{48}.3^{32}}{2^{16}.5^{48}.3^{32}.7^{96}}\)=1
a) \(\dfrac{15^{30}}{45^{15}}=\dfrac{15^{30}}{3^{15}.15^{15}}=\dfrac{15^{15}}{3^{15}}=5^{15}\)
b) \(\dfrac{2^{15}.9^4}{6^6.8^3}=\dfrac{8^5.3^8}{2^6.3^6.8^3}=\dfrac{8^2.3^2}{2^6}=\dfrac{2^6.3^2}{2^6}=3^2=9\)
c) \(\dfrac{14^{10}.21^{32}.35^{48}}{10^{10}.15^{32}.7^{96}}=\dfrac{2^{10}.7^{10}.3^{32}.7^{32}.5^{48}.7^{48}}{2^{10}.5^{10}.3^{32}.5^{32}.7^{96}}\)
= \(\dfrac{2^{10}.7^{58}.3^{32}.5^{48}}{2^{10}.5^{42}.3^{32}.7^{96}}=\dfrac{5^6}{7^{38}}\) ( Câu này làm bừa, có lẽ sai đấy :)) )
2. So sánh
a) 3200 = 9100
2300 = 8100
Vì 9100 > 8100 nên 3200 < 2300
b) 912 = 7294
268 = 6764
Vì 7294 > 6764 nên 912 > 268
c) 224 = 88
316 = 98
Vì 88 < 98 nên 224 < 316
\(\frac{16^{12}.5^{30}.125^6}{32^{10}.81^7.25^{23}}=\frac{2^{48}.3^{30}.5^{30}.5^{18}}{2^{50}.3^{28}.5^{46}}\)
\(=\frac{2^{48}.3^{28}.3^2.5^{46}.5^2}{2^{48}.2^2.3^{28}.5^{46}}\)
=\(\frac{3^2.5^2}{2^2}\)
a)
3210 = (25)10 = 250
1615 = (24)15 = 260
Vì 50 < nên 250 < 260
Vậy 3210 < 1615
b)
2711 = (33)11 = 333
818 = (34)8 = 332
Vì 33 > 32 nên 333 > 332
Vậy 2711 > 818
c)
536 = (53)12 = 12512
1124 = (112)12 = 12112
Vì 125 > 121 nên 12512 > 12112
Vậy 536 > 1124
d)
216 = 23.213 = 8.213
Vì 7 < 8 nên 7.213 < 8.213
Vậy
a) Ta có: 3210 = (25)10 = 250
1615 = (24)15 = 260
Vì 50 < 60 => 250 < 260 => 3210 < 1615
b) Ta có: 2711 = (33)11 = 333
818 = (34)8 = 332
Vì 33 > 32 => 333 > 332 => 2711 > 818
c) Ta có: 536 = (53)12 = 12512
1124 = (112)12 = 12112
Vì 125 > 121 => 12512 > 12112 => 536 > 1124
d) Ta có: 216 = 213.23 = 8.213
Vì 7 < 8 => 7.213 < 8.213 => 7.213 < 8.213
tui ko bít
A=\(\frac{14^{16}.21^{32}.35^{48}}{10^{16}.15^{32}.7^{96}}\)= \(\frac{\left(2.7\right)^{16}.\left(3.7\right)^{32}.\left(5.7\right)^{48}}{\left(2.5\right)^{16}.\left(3.5\right)^{32}.7^{96}}\)= \(\frac{2^{16}.7^{16}.3^{32}.7^{32}.5^{48}.7^{48}}{2^{16}.5^{16}.3^{32}.5^{32}.7^{96}}\)= \(\frac{2^{16}.7^{96}.3^{32}.5^{48}}{2^{16}.5^{48}.3^{32}.7^{96}}\)=1