\(\sqrt{81}:\sqrt{9}+\sqrt{\dfrac{1}{2}}\\ =9:3+\sqrt{\dfrac{1}{2}}\\ =3+\sqrt{\dfrac{1}{2}}\\ =\dfrac{6+\sqrt{2}}{2}\)
\(\sqrt{81}:\sqrt{9}+\sqrt{\dfrac{1}{2}}\\ =9:3+\sqrt{\dfrac{1}{2}}\\ =3+\sqrt{\dfrac{1}{2}}\\ =\dfrac{6+\sqrt{2}}{2}\)
\(A=\frac{\frac{1}{11}-\frac{1}{13}-\frac{1}{17}}{\frac{5}{11}-\frac{5}{13}-\frac{5}{17}}+\frac{\frac{-3}{3}-\frac{2}{9}-\frac{2}{27}+\frac{2}{81}}{\frac{7}{3}-\frac{7}{9}-\frac{7}{27}+\frac{7}{81}}\)
. ( −4 /9 + 3/ 5 ) ∶ 1 /1 5 + ( 1/ 5 − 5 /9 ) : 1 1/ 5
c. √ 1/ 81 - ( 1/ 3 ) 2 : 5 /9 + 15 . (−1 /5 ) ^0
9 nhân 3 mũ 2 nhân 1/81
Tính
1- 2/3 - 2/9 - 2/27 - 2/81 - 2/243
Tim x
a)y^2=4/9
b)(y-5/9)=4/9
c)(2/3x-1/4)^4=81/6
Tìm x,y biết:
1) 3^X-1 = 1/243
2) 81^-2X x 27^X=9^5
3) ( x-y+3)^2 + (y-1)^2=0
viết các biểu thức sau dưới dạng lũy thừa
a) 9 x 3 mũ 2 x 1/81 x 27
b) 4x32 :(2 mũ 3 x 1/16)
c)3 mũ 4 x 3 mũ 5 : 1/27
d) 81 mũ 11 x 3 mũ 17 / 27 mũ 10 x 9 mũ 15
giúp mình:
(2x - 3)^2=9
(1/2)^200+1=1/8
(-1/3)^x-3=1/81
9 * 3 mu 3 * 1 phan 81 * 3 mu 2
4.2mu5 / {2 mu 3. 1 phan 16 }