`x^3 : 3^2 - 16 = 2^3`
`=> x^3 : 9 - 16 = 8`
`=> x^3 : 9 = 8 + 16`
`=> x^3 : 9 = 24`
`=> x^3 = 24 xx 9`
`=> x^3 = 216`
`=> x^3 = 6^3`
`=> x = 6`
`x^3 : 3^2 - 16 = 2^3`
`=> x^3 : 9 - 16 = 8`
`=> x^3 : 9 = 8 + 16`
`=> x^3 : 9 = 24`
`=> x^3 = 24 xx 9`
`=> x^3 = 216`
`=> x^3 = 6^3`
`=> x = 6`
1+1/2 x (1+2) + 1/3 x (1+2+3) + ...........+ 1/16 x (1+2+3+......16) = ?
TÌM X
câu 1: (1/3 + 1/6) . 2^x+3 - 2^x = 2^22 - 2^20
câu 2: (1/2-1/6).3^x+3^x+2=3^16+3^13
câu 3: (1/2 - 1/6) . 3^x+4 - 4 . 3^x = 3^16 - 4 . 3^13
mình cần gấp. mn lm ơn giúp mifh vs ạ. !!!huhuhu
Bài 1: Thực hiện phép tính.
A) 3: ( -1/2 )2 + 1/9 x Căn 36
B) 81 x ( 1/3)3 + 1/3
C) Căn 12 + Căn 27 - Căn 3
D) -32 - ( 1/2)-2 : 2 + (2/3)0 : (3/4)-1
E) 3/4 - ( -1/2 )2
F) 15/16 : (-2 2/3) + 15/16 : ( -1 3/5 )
G) 3/5 + -1/4 + 3/20
H) 3: ( -3/2)2 + 1/9 x căn 36
I) 272 x 85/ 66 x 323
J) (0.8)5/ (0.4)6
K) 272/ 242
L) (0.125)3 x 83
M) (-39)4 : 134
N) (0.6)5/ (0.2)6
O) ( 3/7 + 1/2 )2
P) 2:(1/2 - 2/3 )2
Q) 9x (-1/3)3 + 1/3
Ta có: 4x=5y => x/5=y/4=>x2/25=y2/16
ta có:
x2/25=y2/16=x2-y2/25-16=1/9
x^2/25=1/9=>x^2=25/9=>x=5/3
y^2/16=1/9=>y^2=16/9=>y=4/3
tích của chúng bằng:5/3*4/3=20/9
tìm x
2^5.x+2=8^9
2^7.x+4=32^12
2^6+5.x=16^9
3^3-2.x=27^13
4^-1-5.x=16^12
3^6-3.x=81^3
GIẢI RÕ RÀNG HỘ MIK NHA
A, thực hiện phép tính
M=1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+...+1/16(1+2+3+4+...+16)
B, tìm x biết
|4x+3|-|x-1|=7
tính
( 1/3 - 1/7 - 1/13 ) / ( 2/3 - 2/7 - 2/13 ) x ( 3/4 - 3/16 - 3/64 - 3/256 ) / ( 1- 1/4 - 1/16 - 1/64 ) + 5/8
bài 1
a.\(\dfrac{16}{4}.x=\dfrac{16}{2}\)
b.\(2xy^3+4x^2y+8xy^3-1x^2y\)
c.\(15x+3xyz^3-4xy^2-14x+2xyz^3+xy^2\)
giúp me vứi