Các câu hỏi tương tự
Chứng ming rằng:
A) 2/5+2/6+...+2/75>71/45
B) 2/5+2/6+...+2/75<177/5
C)1/5+1/6+...+1/70<429/40
Chứng ming rằng:
A) 2/5+2/6+...+2/75>71/45
B) 2/5+2/6+...+2/75<177/5
C)1/5+1/6+...+1/70<429/40
Chứng ming rằng:
A) 2/5+2/6+...+2/75>71/45
B) 2/5+2/6+...+2/75<177/5
C)1/5+1/6+...+1/70<429/40
1 a)(6x+4).5=200
b,71+(26-3x):5=75
c,4(2X-6)=16
D,5^3+2-2.5^2=5^2.3
2)CHỨNG MINH :(3+3^2+3^3+3^4+3^6)CHIA HETcho 3
Tìm các số nguyên x, y; biết rằng:
a) x/-6=-15/45
b) x/5=16/25
c) 5/x-3=20/-12
d) 2/5.x=6/35
a) (9x + 2) x 3= 60
b) 71+(26-3x):5=75
c) (x-6)^2 = 9
d) 1+3+.......+x= 465
e)2^x=3^2
h)16:x-1
g) 5^2x-3=5^2x3
12 tháng 3 2022 lúc 14:17
Tính:
\(a,\left(\dfrac{5}{12}-\dfrac{3}{4}\right).\dfrac{-6}{5}+\dfrac{-7}{6}\)
\(b,\left(5\dfrac{1}{2}-5\right)^2+\dfrac{-1}{6}:\dfrac{5}{3}\)
\(c,75\%-1\dfrac{1}{2}+0,5:\dfrac{5}{12}\)
1) (-6 - 2) . (-6 + 2)
2) 627 + 125 + (-627) + |-46| -21
3) (-25) + 30 + (-16) + 25 + (-4)
4) 75 - 5.(15 - 40) - (-60)
5) |31 - 17| - |15 - 52|
6) 13 - 18 - (-42) - 15
7) 369.4.[(- 5) + 4. (-8) ]
8) \(\left(-8\right)^3\) : \(\left(-8\right)^2\) + 8
9) 72 : (-6 . 2 + 4)
Bài 1: Tìm x
a) 51 + ( 20 - 3 . x ) : 5 = 55
b) 71 + ( 26 - 3 . x ) : 5 = 75
c ) ( x - 6 ) \(^2\)= 25
d ) ( x - 6 )\(^3\)= ( x - 6 ) \(^2\)