a ) Tử số : 2^10 . 3^10 - 2^10 . 3^9
= 2^10 . 3^9 ( 3 - 1 )
= 2^10 . 3^9 . 2 = 2^11 . 3^9
=> Phân số : 2^11 . 3^9 /2^9 . 3^10 = 4/3
b ) 5^12 . 7^12 + 9 . 5^11 . 7^11
= 5^11 . 7^11 ( 5 . 7 + 9 )
=5^11 . 7^11 . 44
A=2^10.3^10-2^10.3^9/2^9.3^10
B=5^11.7^12+7^11.5^11/5^12.7^12+9.5^11.7^11
a)2^10.3^10:2^10.3^9/2^9.3^10.
b)5^11.7^12+5^11.7^11/5^12.7^12+9.5^11.7^11
Tìm x biết :
4/x=8/6
3/x-5=-4/x+2
X/-2=-8/x
Rút gọn các phân số
2^4.5^2.11^2.7/2^3.5^3.7^2.11
2^10.3^10-2^10.3^9/2^9.3^10
5^11.7^12+5^12.7^11/5^12.7^12+9.5^11.7^11
a,(2^10.3^10-2^10.3^9) : (2^9.3^10)
b,(11.3^22.3^7-9^15) : (2.3^14)^2
c,(5^11.7^12+5^11.7^12) : (5^12.7^11+9.5^11.7^11
. ((((^ là mũ)))))🍭
rút gọn:
-11^5.13^7/11^5.13^8
2^10.3^10-2^10.3^9/2^9.3^10
Rút gọn
2^10.3^10-2^10.3^9/2^9.3^10
Rút gọn:
2 mũ 10.3 mũ 10-2 mũ 10.3 mũ 9/2 mũ 9.3 mũ 10
2^10.3^10-2^10.3^9/2^9.3^10
2^10.3^10-2^10.3^9/2^9.3^10
