D=(32/15.9/17.3/32):(-3/17)
(2 2/15.9/17.3/32):(-3/17)
giải hộ mik vs ạ hơi khó hiểu xíu
\(=\dfrac{32}{15}\cdot\dfrac{9}{17}\cdot\dfrac{3}{32}\cdot\dfrac{-17}{3}=-\dfrac{9}{3}=-3\)
=(22/15.3/32) . (9/17 : -3/17)
=66/480 . (-3)
=11/80 . (-3)
=-33/80
\(\left(2\dfrac{2}{15}\cdot\dfrac{9}{17}\cdot\dfrac{3}{32}\right):\left(-\dfrac{3}{17}\right)\)
\(=\left(\dfrac{32}{15}\cdot\dfrac{9}{17}\cdot\dfrac{3}{32}\right):\left(-\dfrac{3}{17}\right)\)
\(=\dfrac{9}{85}:\left(-\dfrac{3}{17}\right)\)
\(=\dfrac{9}{85}\cdot-\dfrac{17}{3}\)
\(=-\dfrac{3}{5}\)
a,(32/15.9/17.3/32):(-3/17) f,(-0,75-1/4):(-5)+1/15-(-1/5):(-3)
b,-0,5+(-3/4)+(-2/3)
c,5/4-(-7/2)-7/10
d,1/3-(-7/5)+(-13/4)
e,-5/6-(-3/8+1/10)
f,7/3.(-6/5)+2,6
g,(-1/3+5/6).11-7
h,2/3-4.(1/2+3/4)
tính gia tri cac bieu thuc sau :
B =(-1/6).(-15/19).(38/45)
D=( 2\(\dfrac{2}{15}\).9/17.3/32): (-3/17)
\(B=\dfrac{1}{6}\cdot\dfrac{15}{19}\cdot\dfrac{38}{45}=\dfrac{1}{6}\cdot\dfrac{1}{3}\cdot2=\dfrac{1}{9}\)
\(D=\dfrac{32}{15}\cdot\dfrac{9}{17}\cdot\dfrac{3}{32}\cdot\dfrac{-17}{3}=\dfrac{-9}{15}=-\dfrac{3}{5}\)
Nhanh giùm.mình nha
Trình bày cách làm luôn ạ
2.Tìm phần tử của tập hợp
B={-5;-3;....19;23}
E= {x€N | 4x=-412}
4. Tính
A. (17.3-45)mũ 3
C. (2 mũ 17: 2 mũ 14). 2mũ 4
D. (64mũ4 : 512) :32 mũ 2
G. (81 mũ 7: 27 mũ 4) 9 mũ 5
√17-3√32 -√17+3√32
\(\sqrt{17}-3\sqrt{32}-\sqrt{17}+3\sqrt{32}\\ =\left(\sqrt{17}-\sqrt{17}\right)+\left(3\sqrt{32}-3\sqrt{32}\right)\\ =0+0=0\)
\(=\sqrt{17-12\sqrt{2}}-\sqrt{17+12\sqrt{2}}\)
\(=\sqrt{17-2\cdot3\cdot2\sqrt{2}}-\sqrt{17+2\cdot3\cdot2\sqrt{2}}\)
\(=\sqrt{\left(3-2\sqrt{2}\right)^2}-\sqrt{\left(3+2\sqrt{2}\right)^2}\)
=3-2căn 2-3-2căn 2
=-4căn 2
Tính :
8^3 . 6^10 + 2^17.3^9
gạch (có nghỉa là chia nhé)
16^4 . 3^8 +32 . 3^8
Tính giá trị biểu thức:
a) ( − 3 ) + ( − 32 ) + 12.
b) ( − 17 ) + 7 + ( − 6 ) .
c) ( + 12 ) − 7 − 13.
d) 12 − ( − 32 ) − 9.
kết bn ko tui cg hok lp 6 nè
\(\sqrt{17-3\sqrt{32}}+\sqrt{17+3\sqrt{32}}\)
\(\sqrt{17-3\sqrt{32}}+\sqrt{17+3\sqrt{32}}=\sqrt{\left(3-2\sqrt{2}\right)^2}+\sqrt{\left(3+2\sqrt{2}\right)^2}=3-2\sqrt{2}+3+2\sqrt{2}=6\)
\(\sqrt{17-3\sqrt{32}}+\sqrt{17-3\sqrt{32}}\)
`\sqrt(17-3\sqrt32)+\sqrt(17+3\sqrt32)`
`=\sqrt(17-12\sqrt2)+\sqrt(17+12\sqrt2)`
`=\sqrt(9-12\sqrt2+8)+\sqrt(9+12\sqrt2+8)`
`=\sqrt(3^2-2.3.2\sqrt2 +(2\sqrt2)^2)+\sqrt(3^2+2.3.2\sqrt2+(2\sqrt2)^2)`
`=\sqrt((3-2\sqrt2)^2)+\sqrt((3+2\sqrt2)^2)`
`=3-2\sqrt2+3+2\sqrt2`
`=6`
\(\sqrt{17-3\sqrt{32}}+\sqrt{17+3\sqrt{32}}\)
\(=3-2\sqrt{2}+3+2\sqrt{2}\)
=6