x/2=32/x
32 x 67 +32 x 2 - 32 x 2
= 32 x (67 + 2 - 2 ) = 32 x 67 = 2144
32 x 67 + 32 x 2 - 32 x 2
= 32 x (67+2-2)
=32 x 67
=2144
1.Tính
a) 81 + 243+ 19
b) 2 x 25 x 2 x 16 x 4
c) 32 x 47 + 32 x 54 - 32
Bài giải
a, \(81+243+19=\left(81+19\right)+243=100+243=343\)
b, \(2\text{ x }25\text{ x }2\text{ x }16\text{ x }4=25\text{ x }4\text{ x }2\text{ x }2\text{ x }16=25\text{ x }8\text{ x }32=200\text{ x }32=6400\)
c, \(32\text{ x }47+32\text{ x }54-32=32\text{ x }\left(47+54-1\right)=32\text{ x }100=3200\)
a,81+19+243
=100+243
b,(2x25)x2x(16x4)
=50x2x64
=100x64
=6400
c,32x47+32x54-32x1
=32x(47+54-1)
=32x100
=3200
a,\(81+243+19=\left(81+19\right)+243\)
\(=100+243=343\)
b,\(2\times25\times2\times16\times4=\left(25\times4\right)\times\left(2\times2\times16\right)\)
\(=100\times64=6400\)
c,\(32\times47+32\times54-32=32\times47+32\times54-32\)
\(=\left(47+54-1\right)\times32\)
\(=3200\)
tìm x:
x/32=2/x
x phần 32= 2 phần x
x/32=2/x
=xx=32.2
=2x=64
x=64:2
x=32
chúc bạn học tốt
\(\frac{x}{32}=\frac{2}{x}\)
NHÂN CHÉO CHO NHAU TA CÓ:
\(x.x=32.2\)
\(\Leftrightarrow x^2=64\)
\(\Leftrightarrow x^2=8^2\)
\(\Leftrightarrow x=8\)
BẠN KIA LÀM SAI RỒI X.X MÀ BẰNG 2X CÓ PHẢI X+X ĐÂU
32 x [ 2 x X 9 ] = 32
32 . ( 2 . x9) = 32
2 . x9 = 32 : 32
2 . x9 = 1
x9 = 1:2
x9= 1/2
x = 1/2 : 9
x= 1/18
dấu chấm là nhân nha
l-ike đi
Đúng ghi Đ, sai ghi S:
a) 32 : 4 : 2 = 8 : 2 = 4
32 : 4 : 2 = 32 : 2 = 16
b) 18 : 2 x 3 = 18 : 6 = 3
18 : 2 x 3 = 9 x 3 = 18
a) 32 : 4 : 2 = 8 : 2 = 4
32 : 4 : 2 = 32 : 2 = 16
b) 18 : 2 x 3 = 18 : 6 = 3
18 : 2 x 3 = 9 x 3 = 18
a. 27 x (-17) + (17) x 127
b. 2 x (1 + 32) - 2 x 32
a) 27 x (-17) + 17 x 127
= 27 x (-17) - 17 x (-127)
= -17 x (27-127)
= -17 x -100 = 1700
b) 2 x (1 +32) - 2 x 32
= 2 x (1 + 32 - 32)
= 2 x 1 = 2
1/1-x +1/1+x +2/1+x^2 +4/1+x^4 +8/1+x^8 +16/1+x^16 = 32/1-x^32 c/m
\(\dfrac{1}{1-x}+\dfrac{1}{1+x}+\dfrac{2}{1+x^2}+\dfrac{4}{1+x^4}+\dfrac{8}{1+x^8}+\dfrac{16}{1+x^{16}}\)
\(=\dfrac{1+x+1-x}{1-x^2}+\dfrac{2}{1+x^2}+\dfrac{4}{1+x^4}+\dfrac{8}{1+x^8}+\dfrac{16}{1+x^{16}}\)
\(=\dfrac{2+2x^2+2-2x^2}{1-x^4}+\dfrac{4}{1+x^4}+\dfrac{8}{1+x^8}+\dfrac{16}{1+x^{16}}\)
\(=\dfrac{4+4x^4+4-4x^4}{1-x^8}+\dfrac{8}{1+x^8}+\dfrac{16}{1+x^{16}}\)
\(=\dfrac{8+8x^8+8-8x^8}{1-x^{16}}+\dfrac{16}{1+x^{16}}\)
\(=\dfrac{16+16x^{16}+16-16x^{16}}{1-x^{32}}=\dfrac{32}{1-x^{32}}\)
Tinh gia tri cua phan so: A= 2 x 3 + 2 x 4 x 8 + 4 x 8 x 16 + 8 x 16 x 32/ 3x 4 + 2 x 6 x 8 + 4 x 12 x 16 + 8 x 24 x 32
Câu 4: Biết 2 x+ 32=32 . Số x cần tìm là: A. x= 0 B. x= 64 C. x= 30 D. x=20
Tìm x
A. (x - 36) : (2 x 32) = 23 x 3
B. 2x = 32
C. x3 = 27
d.1579 + ( 625 - x ) = 2023
\(a,\left(x-36\right):\left(2\cdot3^2\right)=2^3\cdot3\\ \Leftrightarrow x-36=432\\ x=468\\ b,2^x=32\\ \Leftrightarrow x=5\\ \Leftrightarrow x^3=27\\ \Leftrightarrow x^3=3^3\\ \Leftrightarrow x=3\\ d,1579+\left(625-x\right)=2023\\ \Leftrightarrow x=1579+625-2023\\ \Leftrightarrow x=181\)
A. \(\left(x-36\right):\left(2.3^2\right)=2^3.3\)
\(\left(x-36\right):\left(2.9\right)=8.3\)
\(\left(x-36\right):18=24\)
\(x-36=24.18\)
\(x-36=432\)
\(x=432+36\)
\(x=468\)
B. \(2^x=32\)
\(2^x=2^5\)
\(x=5\)
C. \(x^3=27\)
\(x^3=3^3\)
\(x=3\)
D. \(1579+\left(625-x\right)=2023\)
\(625-x=2023-1579\)
\(625-x=444\)
\(x=625-444\)
\(x=181\)
a) \(\left(x-36\right)\div\left(2\times3^2\right)=2^3\times3\)
\(\left(x-36\right)\div\left(2\times9\right)=8\times3\)
\(\left(x-36\right)\div18=24\)
\(x-36=432\)
\(x=468\)
b) \(2^x=32\)
\(2^x=2^5\)
\(x=5\)
c) \(x^3=27\)
\(x^3=3^3\)
\(x=3\)
d) \(1579+\left(625-x\right)=2023\)
\(\left(625-x\right)=2023-1579\)
\(625-x=444\)
\(x=625-444\)
\(x=181\)