Question

[Lưu Bá Gia Huy]

Giúp mình trả lời

Answer 1

[❖ XyZ『ʈєɑɱ❖๖ۣۜƝƘ☆』+( ɻɛɑm ❖๖ۣۜƝƘ-...]

\(BT3:a,\frac{3^5}{5^5}\)\(:\frac{1^6}{6^6}\)\(=\frac{3^5}{5^5}\)\(x5^6\)\(=\frac{3^5x5^6}{5^5}\)\(=3^5\)\(x5=243x5=1215\)

\(b,\frac{2^7x3^6}{3^5x2^5x2^6}\)\(=\frac{2^7x3^6}{3^5x2^{11}}\)\(=\frac{3}{2^4}\)\(=\frac{3}{16}\)

\(c,\frac{2^3x3^3+3x2^2x3^2x3^4}{-13}\)\(=\frac{3^3x8+3^3x4+3^3x1}{-13}\)\(=\frac{3^3\left(8+4+1\right)}{-13}\)\(=\frac{3^3x13}{-13}\)\(=-3^3\)\(=-27\)

Answer 2

[❖ XyZ『ʈєɑɱ❖๖ۣۜƝƘ☆』+( ɻɛɑm ❖๖ۣۜƝƘ-...]

\(BT4:a,x+\frac{1}{2}\)\(=0\)

\(x=0-\frac{1}{2}\)\(=-\frac{1}{2}\)

\(b,\left(x-2\right)^2\)\(=1\)

\(x-2=1\)

\(x=2+1=3\)

\(c,\left(2x-1\right)^3\)\(=-8=-2^3\)

\(2x-1=-2\)

\(2x=-2+1=-1\)

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

Đề hơi sai cho mình chỉnh lại tại không có số nào bình phương ra 4 đâu bạn ạ

\(d,\left(x-\frac{2}{3}\right)^2\)\(=4\)

\(\left(x-\frac{2}{3}\right)^2\)\(=2^2\)

\(x-\frac{2}{3}\)\(=2\)

\(x=2+\frac{2}{3}\)\(=\frac{8}{3}\)

\(TH2:\left(x-\frac{2}{3}\right)^2\)\(=-2^2\)

\(x-\frac{2}{3}\)\(=-2\)

\(x=-2+\frac{2}{3}\)\(=-\frac{4}{3}\)

\(=>x=\left(-\frac{4}{3};\frac{8}{3}\right)\)

Đề bài d sai nha bạn đấy là mình là bài sau khi sửa đề nha