(12x4^4-2x4^5):4^5=2.4^4(6-4):4^5
=2x4^4x2:4^5
= 4^4x4:4^5
=4^5:4^5
= 1
( 12 x 44 - 2 x 45 ) : 45
= ( 12 x 256 - 2 x 1024 ) : 1024
= ( 3072 - 2048 ) : 1024
= 1024 : 1024
= 1
(12x44-2x45):45
=2x44x(6-4):45
=2x44x2:45
=44x4:45
=45:45
=1
(12x4^4-2x4^5):4^5=2.4^4(6-4):4^5
=2x4^4x2:4^5
= 4^4x4:4^5
=4^5:4^5
= 1
( 12 x 44 - 2 x 45 ) : 45
= ( 12 x 256 - 2 x 1024 ) : 1024
= ( 3072 - 2048 ) : 1024
= 1024 : 1024
= 1
(12x44-2x45):45
=2x44x(6-4):45
=2x44x2:45
=44x4:45
=45:45
=1
Tìm y biết :(15/4:1/4+12/5x5/4)-(7/2x4/5-6/5:3/2)=64
(3/2+3/4)xy
1/2+2/2x4+3/4x7+4/7x11+5/11x16
Chứng minh rằng : 1x4+2x4 mũ 2+3x4 mũ 3+4x4 mũ 4+5x4 mũ 5+6x4 mũ 6 chia hết cho 3
a)3x5^2-27:3^2-5^2x4-18:3^2
b)2x -1 là bội của x-3
c)205-[ 1200-(4^2 - 2x3)^3] :40
5/2x4+5/4x6+5/6x8+.....+5/48x60
4/ 2x4 +4/4x6+4/6x8+.......+4/2008x2010
4/2x4 + 4/4x6 + 4/6x8 + .... + 4/2014x 2016
tính nhanh 4/2x4 + 4/4x6 + 4/6x8 + .... + 4/2008x 2010
2) (x + 40) x15 = 5 ^ 2 x 3^2x4