Các câu hỏi tương tự
Cau 1 ( 27-x ) . 2017 =0 Cau 2 (x-40).15=15.3 Cau 3 x-280:35=5.54
cau 1
(35+ x) - 81 = 54
cau 2:
890:x=35 du 15
cau 2
4 x x :13=0
A =1/6 x 11 + 1/11 x 16 + 1 phần 16 x 21 + ........+ 1/496 x 501
B = 2/3 +2/15 + 2/ 35 +.....+2/19 x21
Cau 1 .Cho A = 3/4 + 8/9 + 15/16 +…+ 9999/10000
Chung to a lon hon 4/3
CAU 2 . A = x/x+y + y/y+z +x/x+z
Cho z , y z thuoc N* chung to A k thuoc N
giup minh voi cac ban :
1timx
5^x-2-3^2=2^4-(2^8.2^4-2^10.2^2)
697:[(15^x+364):x]=17
134:(x-3)=35+160:5
(3.x-2^4).7^3=2.7^4
[(10-x) .2+5]:3-2=3
2 tim x thuoc N
cau a : n+5chia het n +1
cau b :2.n +7 chia het cho n-2
2^x+3=35
(x+1)^2=16
Cau 1: Tim n biet : 5/8 + 5/24 + 5/48 + 5/80 + ... + 5/2n + 2 . 2n + 4 = 189/112
Cau 2 : Cho A = 1 + 1/1.2 + 1/1.2.3 + ... + 1/1.2.3...2014. So sanh A voi 2
Cau 3 : Tim n biet : 5/3 + 5/15 + 5/35 + 5/63 +...+ 5/2n + 1 . 2n + 3 = 172/69
d) 3 -x = /-4/
e) 35 - /2 x+1/ =14
f) /x/ -3 +6 =16
1) 27,56 x 35 + 27,56 x67- 27,56 x2
2) 4 x 35 x 25 x 5 x2
3) ( 32 x 18 - 16 x 36 ) x( 1+3+5+7+......+1001)
4) 3/5 + 2/5 x 1/2 - 2/3 x 3/4
5) 27 x 13 + 35 x 27 - 12 x 9
6) 33/5 x 15/11 + 22/27 x 81/44 - 3/5 : 9/5