\(=\left(\dfrac{5-4}{6}\right).1296+\dfrac{1}{4}:\left(-\dfrac{1}{2}\right)\\ =\dfrac{1}{6}.1296-\dfrac{1}{2}\\ =216-\dfrac{1}{2}\\ =\dfrac{216.2-1}{2}\\ =\dfrac{431}{2}\)
b) \(\dfrac{2}{5}\)+\(\dfrac{3}{5}\):(\(\dfrac{3}{5}\)+\(\dfrac{-2}{3}\))\(-3\dfrac{1}{2}\)
c) (\(4-\dfrac{5}{12}\)):3+\(\dfrac{7}{36}\)
d) (\(2+\dfrac{5}{6}\)):\(1\dfrac{1}{5}\)+\(\dfrac{-7}{12}\)
1.tìm x biết
g,24+5x=7^5:7^3 h,x:2^2=2^3
2,viết kết quả mỗi phép tính sau dưới dạng 1 lũy thừ
a,2^10.8.2^3 b,3^5:27 c,5^2.125 d,6^6:36
Bài 1 Tìm x,biết
x.3/5=2/3
x.7/17=17/8
3/4 chia x=-7/12
3/8 - 1/6.x=1/4
1/3+1/2 chia x=-4
Bài 2 Tính
-6/11 chia [3/5 . 4/11]
7/12 + 5/12 chia 6 -11/36
[4/5 + 1/2] chia [3/13 - 8/13]
[2/3 - 1/4 + 5/11] chia [5/12 + 1 -7/11]
*Dấu . là dấu nhân nha mn*
1. | 4-2x | . 1/3 = 1/3
2. (-3)² : | x+(-1) | = (-3)
3. | 3/2 -x | + (-4/5) = -14/5
4. (-4/3) - | 2x + (-1) | = -7/3
5. -9 . | 36 - x/2 | = (-54)
6. 0,75 - | (-x) + 1/3 | = 0,25
7. (-6/5) + | x-9 |= (-6/5)
8. (-4) . | 3x - 1/5 | = 12
\(\dfrac{-7}{9}+\dfrac{-2}{9}\)
\(\dfrac{15}{4}-\dfrac{-3}{4}\)
\(\dfrac{1}{6}-\dfrac{1}{36}\)
\(1-\dfrac{3}{2}\)
\(2-\dfrac{4}{5}\)
1, x^2-3=22
2, 2x^3+5=-11
3, (x+2)^2=81
4, (2x+1)^2=25
5, 5^x+2=625
6 , (2x-3)^2=36
7,(2x-1)^3=-8
8, (x-1)^x+2=(x-1)^x+6 voi x thuoc z
9, x^2+x=0
1) ( 2x + 1 ) ^2 = 25
2) 5 ^x+2 = 625
3) ( 2x - 3 ) ^2 = 36
4) ( 2x - 1 ) ^3 = - 8
5) ( x - 1 ) ^x+2 = ( x - 1 ) ^x + 6 với x thuộc Z 19 . x^2 + x = 0
Bài 1 Tính nhanh
a) -3/7 + 5/13 + 3/7
b) -5/21+-2/21+8/24
c) -5/11+(-6/11+2)
d) (-1/32+1/2)+15/32
e)5/17+ -6/13 + 3/4 + 7/-13+12/17
f) 7/23+-18/18+-4/9+16/23+-5/8
g)1/3+-3/4+3/5+-1/36+1/15+-2/9
h)-1/2+1/3+-1/4+-2/8+4/18+4/9
a) 1/2 - 5/6 + 11/33 - 35/40
b) 2/3 . 1 3/4 - 8/9 - 17/51 - 1/5
c) 1/2 . 2 - 2 5/7 + 6/4 - 10/15
d) 1/6 . 1/11 + 4/11 . ( -1/6) + 8/11 . 1/6 + 1/6 . 6/11
e) -17 . (-23) + (-53) . 17 +17 . 14 + 17 .(-24)
f) -19,218 + (-82) .19 - 533 . 19 + (-19) . 167
g) 2/5 + 3/8 - 11/44 + 9/16
h) 4/10 - 1 5/6 . 2 + 7/8 -1/9
i ) 3. 1/5 - 2/8 - 12/36 + 15/9
k) 6/8 . 3 1/2 + 4 2/3 - 11/55 + 17/51
l ) 1/3 . 3 1/2 - 4 2/5 - 26/78 + 17/51
a)2/x=y/3
b)5/15=1/x=y/21=10/z
c)-36/6=6/x=-9/y^2=z^3/36
