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a nhân loạn lên, c 813=(34)3=312:3x....
d)NHớm x-7x+1 vào
\(\left(\frac{1}{4}\right)^{44}.\left(\frac{1}{2}\right)^{12}=\left(\left(\frac{1}{2}\right)^2\right)^{44}.\left(\frac{1}{2}\right)^{12}=\left(\frac{1}{2}\right)^{88}.\left(\frac{1}{2}\right)^{12}=\left(\frac{1}{2}\right)^{100}\)
\(\frac{3^{17}.\left(3^4\right)^{11}}{\left(3^3\right)^{10}.\left(3^2\right)^{15}}=\frac{3^{17}.3^{44}}{3^{30}.3^{30}}=\frac{3^{61}}{3^{60}}=3\)
a.\(\frac{3}{5}\).x-( -\(\frac{1}{2}\))2=\(\sqrt{\frac{9}{16}}\)
<=> \(\frac{3.x}{5}\)-\(\frac{1}{4}\)=\(\frac{3}{4}\)
<=> \(\frac{3.x}{5}\)=1
<=> 3x=5
<=> x= \(\frac{5}{3}\)
b, x-\(\frac{1}{2}\)+\(\frac{1}{3}\)=\(2\frac{1}{3}\)
<=> x=\(2\frac{1}{3}\)+\(\frac{1}{2}\)-\(\frac{1}{3}\)
<=> x=2\(\frac{1}{2}\)
c,33x: 11x =81
<=> ( 3.11)x: 11x=81
<=> 3x. 11x; 11x=81
<=> 3x=81
<=> 3x= 34
<=> x= 4
a, \(\frac{3}{5}x-\frac{1}{4}=\frac{3}{4}\)
\(\frac{3}{5}x=\frac{3}{4}+\frac{1}{4}\)
\(\frac{3}{5}x=1\)
\(x=1:\frac{3}{5}\)
\(x=\frac{5}{3}\)
b, \(x-\frac{1}{2}+\frac{1}{3}=\frac{7}{3}\)
\(x=\frac{7}{3}-\frac{1}{3}+\frac{1}{2}\)
\(x=\frac{5}{2}\)
c, ( 33:11 )x = 81
3x = 81
3x = 34
=> x = 4
Nhớ tích đúng cho mh nha !!!!!!!!!!!
33x : 11x = 81
(3.11)x : 11x = 81
3x.11x : 11x = 81
3x = 34
=> x = 4
Vậy x = 4