`1/16 . 4^3 . 4^x = 4^6`
`=> (1/4)^2 . 4^2 . 4 . 4^x = 4^6`
`=> 1 . 4 . 4^x = 4^6`
`=> 4 . 4^x = 4^6`
`=> 4^x = 4^5`
`=> x = 5`
Vậy ...
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
tìm x biết
1) x=-1/2 + 3/4 2) x - 1/5 = 2/11 3) x - 5/6 = 16/42 + -8/56
4) x/5 = 5/6 + -19/30 5) |x| - 1/4 = 6/18 6)x = -1/2 +3/4
7) x/15 = 3/5 + -2/3 8)11/8 + 13/6 = 85/x 9) x - 7/8 = 13/12
10) x - -6/15 = 4/27 11) -\(\dfrac{-6}{12}\)+ x = 9/48 12) x - 4/6 = 5/25 + -7/15
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
tìm x :
a/ (1/3 + 1/6 ) . 2x + 2x+1 = 212 + 210
b/ (1/2 - 1/6 ) . 3x+4 - 4 . 3x = 316 - 4 . 313
c/ 3/2 . 4x + 5/3 . 4x+2 = 3/2 . 48 + 5/3 . 410
Tìm x biết :
a, 4.(18 - 5x) - 12.(3x - 7) = 15.(2x - 16) - 6(x + 14)
b, 5.(3x + 5) - 4.(2x - 3) = 5x + 3.(2x + 12) + 1
c, 2.(5x - 8) - 3.(4x - 5) = 4.(3x - 4) + 11
d, (3x + 2)(2x + 9) - (x + 2)(6x + 1) = (x + 1) - (x - 6)
e, (8x - 3)(3x + 2) - (4x + 7)(x + 4)= (2x + 1)(5x - 1) - 33
1a)tìm x,y biết: \(4+\frac{x}{7+y}=\frac{4}{7}and:x+y=22\)
b)cho \(\frac{x}{3}=\frac{y}{4}\)và \(\frac{y}{5}=\frac{z}{6}\). Tính M=\(\frac{2x+3y+4z}{3x+4y+5z}\)
c) tìm x biết \(\frac{1}{4}.\frac{2}{6}.\frac{3}{8}.\frac{4}{10}...\frac{30}{62}.\frac{31}{64}=2^x\)
d)\(\frac{4^5+4^5+4^5+4^5}{3^5+3^5+3^5}.\frac{6^5+6^5+6^5+6^5+6^5+6^5}{2^5+2^5}=2x\)
2. Tính:P=\(1+\frac{1}{2}\left(1+2\right)+\frac{1}{3}\left(1+2+3\right)+...+\frac{1}{16}\left(1+2+..+16\right)\)
Tìm số nguyên x, nếu biết
\(5^{x+4}-3.5^{x+3}=2.5^{11}\)
\(4^{x+3}-3.4^{x+1}=13.4^{11}\)
\(\left(\frac{1}{3}+\frac{1}{6}\right)2^{x+4}-2^x=2^{13}-2^{10}\)
\(\left(\frac{1}{2}-\frac{1}{6}\right)3^{x+4}-4.3^x=3^{16}-4.3^{13}\)
Tìm x trong các tỉ lệ thức sau:
a) 4/x=8/x+1
b)x/7=x+16/35
c)6/x-3=7/x-5
d)44-x/3=x-12/5
Bài1: tìm x,biết: a, 2^x=8^4/16^3 b,2^x=2^6/4^3 C,2^x-3/4^10=8^3
Tính
(2/5)^6 : (2/5)^4
(3/16)^2 : (9/8)^2
(2/7 - 1/2)^2
Tìm x , biết
x/1,5 = 4/3
2/9 = x/-72
x: -3/8 = 1/3
|x| = 3,5
|x - 1| = 3,5
Tính
(3/7 + 1/2)^2
(1+2/3 - 1/4)x(4/5 - 3/4)^2
