Các câu hỏi tương tự
Tìm x biết :
a)\(3^{-2}.3^2.27^x=\frac{1}{3}\)
b)\(7^{x+2}+2.7^{x-1}=345\)
c)\(\left(2x-1\right)^6=\left(2x-1\right)^8\)
Tim x, biet:
a,\(\left(2x+1\right)^2=25\)
b,\(\left(x-1\right)^3=-125\)
c,\(2^{x+2}-2^x=96\)
d,\(7^{x+2}+2.7^{x-1}=345\)
Câu 1:Tìm x biết
\(a:\left(2x+1\right)^2=25\)
\(b:\left(x-1\right)^3=-125\)
\(c:2^{x+2}-2^x=96\)
\(d:7^{x+2}+2.7^{x-1}=345\)
Câu 2:chứng minh rằng
\(a:5^2-7^4+5^3\)chia hết cho bảy
b:\(7^6+7^5-7^4\)chia hết cho 11
Tìm x biết:
a) \(\left|x+2\dfrac{1}{2}\right|=\left|3x+1\right|\)
b) \(\left|2x-6\right|+\left|x+3\right|=8\)
c) \(2.\left|x+2\right|+\left|4-x\right|=11\)
Tìm x
\(a,\left|x.\left(x-7\right)\right|=x\)
\(b,\left|x-1,1\right|+\left|x+1,2\right|+\left|x+1,3\right|+\left|x+1,4\right|=5x\)
\(c,7^{x+2}+2.7^{x-1}=345\)
tính:
\(a.9^x:3^x=3^7\)
b.\(\frac{1}{2}.2^x+2^{x+2}=2^8+2^5\)
c\(^{7^{x+2}+2.7^{x-1}=345}\)
d \(\left(\frac{1}{2}-\frac{1}{3}\right).6^x+6^{x+2}=6^7+6^4\)
Tìm x a,3-xx+1,8b,2x-57x+35c,2left(x+10right)3left(x-6right)d,8left(x-dfrac{3}{8}right)+16left(dfrac{1}{6}+xright)+xe,dfrac{2}{9}-3xdfrac{4}{3}-xg,dfrac{1}{2}x+dfrac{5}{6}dfrac{3}{4}x-dfrac{1}{2}h,x-4dfrac{5}{6}left(6-dfrac{6}{5}xright)k,7x^2-116x^2-2m,5left(x+3.2^3right)10^2n,dfrac{4}{9}-(dfrac{1}{6^2})dfrac{2}{3}left(x-dfrac{2}{3}right)^2+dfrac{5}{12}
Đọc tiếp
Tìm x
\(a,3-x=x+1,8\)
\(b,2x-5=7x+35\)
\(c,2\left(x+10\right)=3\left(x-6\right)\)
\(d,8\left(x-\dfrac{3}{8}\right)+1=6\left(\dfrac{1}{6}+x\right)+x\)
\(e,\dfrac{2}{9}-3x=\dfrac{4}{3}-x\)
\(g,\dfrac{1}{2}x+\dfrac{5}{6}=\dfrac{3}{4}x-\dfrac{1}{2}\)
\(h,x-4=\dfrac{5}{6}\left(6-\dfrac{6}{5}x\right)\)
\(k,7x^2-11=6x^2-2\)
\(m,5\left(x+3.2^3\right)=10^2\)
\(n,\dfrac{4}{9}-(\dfrac{1}{6^2})=\dfrac{2}{3}\left(x-\dfrac{2}{3}\right)^2+\dfrac{5}{12}\)
Bài 1 : Tìm x biết :a, left|frac{3}{2}x+frac{1}{2}right|left|4x-1right|b, left|frac{5}{4}x-frac{7}{2}right|-left|frac{5}{8}x+frac{3}{5}right|0c,left|frac{7}{5}x+frac{2}{3}right|left|frac{4}{3}x-frac{1}{4}right|Bài 2 : Tìm x biết :a, | 2x - 5 | x +1 b, | 3x - 2 | -1 x c, | 3x - 7 | 2x + 1d, | 2x-1 | +1 x
Đọc tiếp
Bài 1 : Tìm x biết :
a, \(\left|\frac{3}{2}x+\frac{1}{2}\right|=\left|4x-1\right|\)
b, \(\left|\frac{5}{4}x-\frac{7}{2}\right|-\left|\frac{5}{8}x+\frac{3}{5}\right|=0\)
c,\(\left|\frac{7}{5}x+\frac{2}{3}\right|=\left|\frac{4}{3}x-\frac{1}{4}\right|\)
Bài 2 : Tìm x biết :
a, | 2x - 5 | = x +1
b, | 3x - 2 | -1 = x
c, | 3x - 7 | = 2x + 1
d, | 2x-1 | +1 = x
tìm các số nguyên n sao cho
\(\left(\frac{4}{9}\right)^n=\left(\frac{2}{3}\right)^5\)
Tìm X
\(7^{X+2}+2.7^{X-1}=345\)