13
phiếu
4đáp án
4K lượt xem

Giải hệ phương trình

Giải hệ phương trình: $\left\{ \begin{array}{l}\log_2x+\log_4y+\log_4z=2\\\log_3y+\log_9z+\log_9x=2\\\log_4z+\log_{16}x+\log_{16}y=2\end{array} \right.$
0
phiếu
4đáp án
3K lượt xem

Đại số 12

1, Cho $\log _25$ = a, $\log_\sqrt{27}8$ = b. Tính $\log _{25}45$2, Cho $\log_9 50$ = a, $\log_\sqrt{27} 40$ = b. Tính $\log_{25} 80$3, CHo...
0
phiếu
5đáp án
2K lượt xem

đại 12

Tính các biểu thức sau: 1) $\log _a\sqrt[3]{\sqrt{a} } $2) $\frac{1}{2}\log _736-\log _714-3\log _7\sqrt[3]{21} $3) ...
2
phiếu
9đáp án
3K lượt xem

Phương trình lôgarit

a) Giải phương trình$\log_{5x+9}(x^2 + 6x + 9) + \log_{x+3}(5x^2 + 24x + 27) = 4$b)...
2
phiếu
9đáp án
476 lượt xem
10
phiếu
22đáp án
3K lượt xem
5
phiếu
23đáp án
2K lượt xem
6
phiếu
24đáp án
3K lượt xem

$\;$

Giải PT: $\frac{1}{4-\log x}+\frac{2}{2+\log x}=1 $

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