THU GON 3 mu 25 - 3 mu 4 tren 3 mu 21
Rut gon cac phan so
a) -21 / 49 ; 39 / -65
b ) 5 mu 4 . 7 mu 3 / 5 mu 5 . 7 mu 2 ; 2 mu 2 . 3 mu 5 . 5 / 2 mu 4 . 3 mu 4 . 5 mu 2
( x - 1 ) mu 2 : 5 mu 21 = 25 mu 30 . 5
2.3 mu x + 1 = 10.3 mu 12 + 8 : 27 mu 4
( 19x + 2 .5 mu 2) : 14 = ( 13 - 8 ) mu 2
1351 - 2 . ( x + 3) = 4 mu 12 : 8 mu 7 + 3
mong m.n giup mk vs !!!!
tính tổng
B= 7-7 mu 4 + 7 mu 4 -........+7 mu 301
A = 1 + 5 mũ 2 + 5 mu 4 + 5 mu 6 +.....+5 mu 200
tính
A= 1/7+1/7mu 2 + 1/7 mu 3+......+1/7mu 100
B=-4/5+4/5 mu 2 - 4/5 mu 3 + ....+4/5mu 200
tính A=25 mũ 8 + 25 mũ 4 + 25 mu 20 +......+25 mu 4 +1 / 25 mu 20 + 25 mu 28 + 25 mu 26 +.....= 25 mu 2 +1
rut gon A= 2 + 2 mu 2 + 2 mu 3 + 2 mu 4 +....+ 2 mu 8
bai 2, viet gon duoi dang 1 luy thua ;
a, 3 mu 6 nhan 3 mu 8 b, 2 mu 7 nhan 2 mu 11 c 5 mu 4 nhan 5 mu 6 d,16 nhan 2 mu 5
e, 3 mu 7 nhan 2 mu 7 f, 25 nhan 5 mu 7 nhan 125 g, 27 nhan 3 mu 4 nhan 9 h, 64 nhan 8 nhan 2 mu5
giup minh voi thu 6 la minh can roi ai nhanh minh nhan like
Tìm x thuộc N biết
a, 2 mũ x . 7 = 56
b, 3 mu x : 9 = 27
c, ( 3 . x 1 ) mu 3 . 4 mu 6 = 4 mu 9
Dấu chấm là dấu nhân nha. phan c minh viet mu 3 o ben tren dau ngoac nha .cac ban dung hieu la 1 mu 3
6 mu 5 nhan 2 mu 7 tren 3 mu 4 nhan 2 mu 10
rut gon
A = 1 +1 /2 +1/2 mu 2+ 1/2 mu 3 .+...... + 1/2 mu 2012