Tim x

\(\left(7x+2\right)^{-1}=3^{-2}\)

Cac ban vui long giai day du giup minh

Tim x;

\(3^{x-1}+5\times3^{x-1}=162\)

Cac ban vui long giai day du giup minh!

\(h,\left(0,125\right)^3\times512\)

\(l,\left(0,25\right)^4\times1024\)

\(\left(0,25\right)^4\times1024=?\)

Cách làm lun nha

1 , \(c=\frac{10\frac{1}{3}.\left(26\frac{1}{3}-\frac{176}{7}\right)-\frac{12}{11}.\left(\frac{10}{3}-1,75\right)}{\frac{5}{\left(91-0,25\right).\frac{60}{11}-1}}\)

2 , \(A=\frac{0,375-0,3+\frac{3}{11}+\frac{3}{12}}{-0,265+0,5-\frac{5}{11}-\frac{5}{12}}+\frac{1,5+1-0,75}{2,5+\frac{5}{3}-1,25}\)

cac ban giai nhanh giup minh nha! ai nhanh minh k!

\(\frac{2}{\left(x-1\right)\left(x-3\right)}\)+\(\frac{5}{\left(x-3\right)\left(x-8\right)}\)+\(\frac{12}{\left(x-3\right)\left(x-8\right)}\)-\(\frac{1}{x-20}\)=-\(\frac{3}{4}\)

Giup minh nhe cac ban :))☻ ☻ 

Tính  A=\(\frac{2^{12}.3^5-4^6.4^2}{\left(2^2.3\right)^6+8^4.8^5}=\frac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^3.14^3}\) 

cac ban giup minh nha. minh the neu ai giup minh se like cho nguoi ay 100 luon. the day

Các ban giúp mình giải bài này với

Tính A=\(1+\frac{1}{2}\left(1+2\right)+\frac{1}{3}\left(1+2+3\right)+....+\frac{1}{2011}\left(1+2+3+...+2011\right)\)

\(Giai\)\(giup\)\(minh\)help me

\(\frac{\left(-3\right)^x}{81}=-27\)

\(1\frac{1}{2}.x-4=0,5\)

2^x-1=16

lam on giai day du ho minh nka minh se tich cho