Tính nhanh
0.8×88 + 3.2 ×3
thực hiện phép tính
4^3 .27 -4^3 .23
35 .77+23 .35+5^3.2^3
3^2.5+2^3.10-81:3
151-2^91:2^88+1^3.3
a) 43.27 - 43.23
= 43.(27-23)
= 43.4
= 44
b) 35.77+23.35+53.23
= 35.(77+23) + (5.2)3
= 35.100 + 103
= 35.102+ 102.10
= 102.(35+10)
= 100.45
= 4500
c) 32.5 + 23.10 - 81 : 3
= 9.5 + 8.2.5 - 27
= 5.(9+8.2) - 27
= 5.25 - 27
= 53 - 27
= 98
d) 151-291:288+13.3
= 151 - 23+3
= 151 - 8 + 3
= 146
Giúp mình với!
83.1111.255=?
2x+3+3.2x= 88
2^x+3+3.2^x=88
=>2^x.2^3+3.2^x=88
=>2^x.(8+3)=88
=>2^x.11=88
2^x=8
2^x=2^3
vậy x=3
2x-2 - 3.2x=-88
\(2^{x-2}-3.2^x=-88\)
\(\Rightarrow2^x:2^2-3.2^x=-88\)
\(\Rightarrow2^x.\left(\dfrac{1}{4}-3\right)=-88\)
\(\Rightarrow\)\(2^x.\left(-2\dfrac{3}{4}\right)=-88\)
\(\Rightarrow\)\(2^x=\)32
=> x=5
\(2^{x-2}-3.2^x=-88\)
\(2^x.2^{-2}-3.2x=-88\)
\(2^x.\left(2^{-2}-3\right)\) =-88
\(2^x.\left(\dfrac{1}{4}-3\right)\) =-88
\(2^x.\left(\dfrac{-11}{4}\right)\) =-88
\(2^x\) =\(-88:\left(\dfrac{-11}{4}\right)\)
\(2^x\) =32
\(2^x=2^5\)
\(\Rightarrow\) x=5
\(2^{x-2}-3.2^x=-88\)
\(2^{x-2}-3.2^x=-88\)
\(\Leftrightarrow2^x.\frac{1}{4}-3.2^x=-88\)
\(\Leftrightarrow2^x\left(\frac{1}{4}-3\right)=-88\)
\(\Leftrightarrow2^x.\frac{-11}{4}=-88\)
\(\Leftrightarrow2^x=-88.\frac{-4}{11}\)
\(\Leftrightarrow2^x=-8.\left(-4\right)\)
\(\Leftrightarrow2^x=32=2^5\)
\(\Leftrightarrow x=5\)
Vậy x = 5
\(2^{x-2}-3.2^x=-88\)
\(\left(5x-1\right).\left[2x-0,\left(3\right)\right]=0\)
\(2^{x-2}-3.2^x=-88\)
\(2^x:2^2-2^x:\frac{1}{3}=-88\)
\(2^x:\left(2^2-\frac{1}{3}\right)=-88\)
\(2^x:\frac{11}{3}=-88\)
\(2^x=-88.\frac{11}{3}\)
\(2^x=\frac{-968}{3}\)
\(2^{x-2}-\)\(3.2^x=-88\)
\(2^x:2^2-2^x.3=-88\)
\(2^x.\frac{1}{4}-\)\(2^x.3=-88\)
\(2^x.\left(\frac{1}{4}-3\right)=-88\)
\(2^x.\frac{-11}{4}=-88\)
\(2^x=-88:\frac{-11}{4}\)
\(2^x=32\)
\(2^x=2^5\)
\(\Rightarrow x=5\)
a)\(2^{x-2}\)-\(3\times2^x\)=(-88)
=>\(2^x\times\frac{1}{2^2}-3\times2^x=\left(-88\right)\)
\(\Rightarrow2^x\times\left(\frac{1}{4}-3\right)=\left(-88\right)\)
\(\Rightarrow2^x\times\left(\frac{-11}{4}\right)=\left(-88\right)\)
\(\Rightarrow2^x=32=2^5\)
\(\Rightarrow x=5\)
Tìm X biết:
2^x-2-3.2^x=-88
Ai giúp vs
Tính tổng
A = \(2^{100}-3.2^{99}+3.2^{98}-3.2^{97}+...+3.2^2-3.2+3\)
Tìm x biết
2^+2 - 3.2^x = -88
bài này mình làm mà ko ra x
giúp mình với
Thực hiện phép tính sau :
a) 151 - 291: 288 +12.3
b)1449 - {[(216 + 184):8].9}
c)23.75+25.23+180
d)80 -(4.52 -3.23)
Giúp mình nha ! Cảm ơn nhiều !
a) 151 - 291 : 288 + 12 . 3
= 151 - 23 + 1 . 3
= 151 - 8 + 3
= 143 + 3
= 146
b) 1449 - { [ ( 216 +184 ) : 8 ] . 9 }
= 1449 - { [ 400 : 8 ] . 9 }
= 1449 - { 50 . 9 }
= 1449 - 450
= 999
c) 23 . 75 + 25 . 23 + 180
= 23 . ( 75 + 25 ) + 180
= 23 . 100 + 180
= 2300 + 180
= 2480
d) 80 - ( 4 . 52 - 3 . 23 )
= 80 - ( 4 . 25 - 3 . 8 )
= 80 - ( 100 - 24 )
= 80 - 76
= 4
151-291:288+12*3=151-23+1*3=151-8+1*3=146
b, 1449-{[(216+184):8]*9}=1449-{[400:8]*9}=1449-{50*9} = 1449-450=999
c,23*75+25*23+180=25*(75+23)+180=2630
d,80-(4*52-3*23)=80-(4*25-3*8)=4