a)\(\left(x-\frac{1}{2}\right)\)\(x\)\(\left(\frac{2}{3}-2x\right)\)\(=\)\(0\)

b)\(\left(\frac{1}{2}+1\right)\)\(x\)\(\left(\frac{1}{3}+1\right)\)\(x\)\(\left(\frac{1}{4}+1\right)\)\(x\)\(...\)\(x\)\(\left(\frac{1}{99}+1\right)\)

Các bạn giúp mình nha !!!

1,tìm x

a.\(3^x\)=81

b.\(5^{x+2}\)=125

c.\(2^3\)*\(2^{x-1}\)=64

d. 7*\(7^{n+1}\)=343

e.\(\left(x+3\right)^5\)=243

f.\(\left(2x-3\right)^6\)=64

g.\(\left(x-6\right)^3\)=\(\left(x-6\right)^2\)

h.\(\left\{\left[\left(2x+14\right):2^2-3\right]:3\right\}\)-1=0

i.\(\left\{\left[\left(x:3+17\right):10+3\cdot2^4\right]:10\right\}=5\)

2,tính

a.\(7^{3^1}\)         b.\(7^{1^3}\)      c.\(6^{1^{2^{3^4}}}\)       d.\(2017^{2^{0^{1^0}}}\)      e.\(6^3:6^2-6^2:6\)    f.\(\frac{11\cdot2^{22}\cdot3^7-9^{15}}{\left(2\cdot3^{14}\right)^2}\)

Tìm x thuộc Z, biết:

a. 1 + \(\left\{-2-[-3+\left(-4+\left|x\right|\right)]\right\}=1-2+[\left(-3-4\right)]\)

b. 34 + (9 - 21) = 3417 - (x + 3417)

c. x - \(\left\{55-[49+\left(-28-x\right)]\right\}=13-\left\{47+[25-\left(32-x\right)]\right\}\)

d. (15 - x) + (x - 12) = 7 - (-8 + x)

e. - 7 + \(\left|x-4\right|\) = - 3

f. 13 - \(|\)x + 5\(|\) = 13

g. \(|\)x + 1\(|\) > 2

h. \(|\)x + 2\(|\) ≤ 5

i. \(|\)x - 10\(|\) - (-12) = 4

1. Tìm x,y thuộc Z:

a, \(\left(x+1\right)\left(y-5\right)=17\)

b, \(\left(2x-1\right)\left(y+4\right)=10\)

c, \(x.y-2x+y=8\)

d, \(x.y+4y-3x=1\)

2. Tìm x,y thuộc Z để:

a, \(\left(x+1\right)^2+\left(y+5\right)^2=16\)

b, \(\left(x+4\right)^2+\left(y-2\right)^4=5\)

c, \(|x-3|+\left(y-7\right)^2=3\)

d, \(\left(x-7\right)^2+\left(y-2\right)^2=20\)

3. Tìm a,b,c biết:

a, \(\overline{4a7b⋮}\)\(225\)

b, \(\overline{1a21b⋮}\)\(12\)

c, \(\overline{a165b⋮}\)\(55\)

d, \(\overline{313ab⋮}\) \(37\)

e, \(\overline{61ab⋮}\) \(79\) 

g, \(\overline{11abc⋮}\)\(437\)

h, \(\overline{261abc⋮}\) \(713\)

Giải nhanh hộ mình nhé!!

bài 2 tìm x

a,\(\frac{-2}{3}.x+\frac{1}{5}=\frac{3}{10}\)

b,\(\left|x\right|-\frac{3}{4}=\frac{5}{3}\)

c,\(\frac{2}{3}.x-\frac{1}{2}=\frac{1}{10}\)

d,\(\frac{3}{5}+\frac{4}{9}:x=\frac{2}{3}\)

e,\(\left|x+75\%\right|=2\frac{1}{5}\)

i,\(\left(x+\frac{1}{2}\right).\left(\frac{2}{3}-2.x\right)=0\)

k,\(\frac{4}{7}.x-\frac{2}{3}=\frac{1}{5}\)

l,\(\frac{2}{3}.x-\frac{3}{2}.x=\frac{5}{12}\)

m,\(\left|2.x-\frac{1}{3}\right|+\frac{5}{6}=1\)

n,\(\frac{1}{3}-\frac{7}{8}.x=\frac{1}{3}\)

11,\(\frac{x+2}{5}=\frac{7}{12}-1\frac{1}{4}\)

12,\(\left(2\frac{4}{5}.x-50\right):\frac{2}{3}=51\)

13,\(\frac{2}{5}+\frac{3}{5}.\left(3.x-3,7\right)=-\frac{53}{10}\)

14,\(\frac{7}{9}:\left(2+\frac{3}{4}.x\right)+\frac{5}{9}=\frac{23}{27}\)

1.

a, \(^{^2}\left(x-2\right)=9\) b,\(^{^3}\left(3x-1\right)=-8\) c, \(\left(x+\dfrac{1}{2}\right)^2=\dfrac{1}{16}\) d, \(\left(\dfrac{2}{3}\right)^x=\dfrac{4}{9}\) e, \(\left(\dfrac{1}{2}\right)^{x-1}=\dfrac{1}{16}\) f,\(\left(\dfrac{1}{2}\right)^{2x-1}=8\)

2.tìm số tự nhiên n biết

a, \(3^{n-1}=27\) b, \(3^{n-1}=\dfrac{1}{243}\) c, \(\left(\dfrac{1}{2}\right)^{2n-1}=\dfrac{1}{8}\) d, \(\left(-\dfrac{1}{3}\right)^{n-5}=\dfrac{1}{81}\) e,\(2^{-1}.2^n+4.2^n=9.2^5\)