
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.



\(3^x.3^{x+1}.3^{x+2}=36\)
\(\Rightarrow\)\(3^{x+x+1+x+2}=36\)
\(\Rightarrow\)\(3^{3x+3}=36\)
\(\Rightarrow\) \(3^{3x}\cdot3^3=36\)
\(\Rightarrow\) \(3^{3x}.27=36\)
\(\Rightarrow\) \(3^{3x}=\frac{4}{3}\)
\(\Rightarrow\)Không có giá trị x thỏa mãn

36 x 12 + 36 x 45 + 36 x 33
= 36 x (12 + 45 + 33)
= 36 x 90
= 3240
b) 78 x 31 + 78 x 24 + 78 x 17 + 22 x 72
=78 x (31 + 24 + 17) + 22 x 72
= 78 x 72 + 22 x 72
= (78 + 22) x 72
= 100 x 72
= 7200
c) ( 34 - 17 )2 - 23 x 32
\(=17^2-8.9\)
\(=289-72\)
\(=217\)

a) Ta có: \(\left[\frac{\left(8x-12\right)}{4}\right]\cdot3^3=3^6\)
\(\Leftrightarrow\frac{8x-12}{4}=3^3\)
\(\Leftrightarrow2x-3=3^3\)
\(\Leftrightarrow2x-3=27\)
\(\Leftrightarrow2x=30\)
hay x=15
Vậy: x=15
b) Ta có: \(3^{2+1}+3^x=36\)
\(\Leftrightarrow3^3+3^x=36\)
\(\Leftrightarrow3^x=9\)
hay x=2
Vậy: x=2
c) Ta có: \(2^{x+1}=16\)
\(\Leftrightarrow2^{x+1}=2^4\)
\(\Leftrightarrow x+1=4\)
hay x=3
Vậy: x=3
1.a)
[(8x - 12) : 4] . 33 = 36
(8x - 12) : 4 = 36 : 33 = 33 = 27
8x - 12 = 27 . 4 = 108
8x = 108 + 12 = 120
x = 120 : 8 = 15
b)
32+1 + 3x = 36
27 + 3x = 36
3x = 36 - 27 = 9 = 32
=> x = 2

1) (x+2)2=36
(x+2)2=62
=>x+2=6 hoặc x+2=-6
x=6-2 hoặc x=-6-2
x=4 hoặc x=-8
2)\(\left(\frac{3}{4}\right)^x=\frac{2^8}{3^4}\)
\(\left(\frac{3}{4}\right)^x:\frac{2^8}{3^4}=0\)
\(\left(\frac{3}{4}\right)^x.\frac{3^4}{2^8}=0\)
không có giá trị x nào thỏa mãn vì \(\left(\frac{3}{4}\right)^x>0;\frac{3^4}{2^8}>0\)
5(x-2)(x+3)=1
5(x-5)(x+3)=50
=>(x-2)(x+3)=0
=>x-2=0 hoặc x+3=0
x=2 hoặc x=-3
(x-2)8=(x-2)6
vì 8 là mũ chẵn nên (x-2)8=(x-2)6 khi:
x-2=0 hoặc x-2=1 hoặc x-2=-1
x=2 hoặc x=1/2 hoặc x=1

3[2x+1]=5+10
3[2x+1]=15
2x+1=15:3
2x+1=5
2x+1=22+1
=>x=2
5x+1=36-10
5x+1=26
5x+1=52+1
=>x=2

a) 2x+1 = 64
2x . 2 = 64
2x = 64 : 2
2x = 32
2x = 25
=> x = 5
b) 3x + 3x+1 = 36
3x . 1 + 3x . 3 = 36
3x . ( 1 + 3 ) = 36
3x . 4 = 36
3x = 36 : 4
3x = 9
3x = 32
=> x = 2
c) 2x + 2x+1 + 2x+2 + 2x+3 = 120
2x . 1 + 2x . 2 + 2x . 22 + 2x . 23 = 120
2x . ( 1 + 2 + 22 + 23 ) = 120
2x . 15 = 120
2x = 120 : 15
2x = 8
2x = 23
=> x = 3
a, 64=2^6=> x=5
b.3^x+3(x+1)=4.3^x=36=4.3^2=> x=2
c.2^x+........2^x3=(1+2+4+8).2^x=15.2^x=120=15.2^3 =>x=3
d.5^x+5^(x-2)=26.5^(x-2)=3150=126.5^2 có lẽ đề sai ở đâu đó

a)= \(3^{x-1}=3^4\)
=>\(x-1=4\)
\(x=1+4\)
\(x=5\)
b)
\(3^{2.x}=36\)
\(x=2\)

\(=>2\cdot4^x+64\cdot4^x=1056\)
\(=>4^x\cdot\left(2+64\right)=1056\)
\(=>4^x=1056:66=16\)
\(=>4^x=4^2\)
\(=>x=2\)
ti ck nha
2.22x + 43.4x = 1056
=> 2.4x + 43.4x = 1056
=> (2 + 64).4x = 1056
=> 66.4x = 1056
=> 4x = 1056 : 66
=> 4x = 16
=> 4x = 42
=> x = 2
7.4x - 1 + 4x + 1 = 23
=> 7.4x.1/4 + 4x.4 = 23
=> (7/4 + 4).4x = 23
=> 23/4.4x = 23
=> 4x = 23 : 23/4
=> 4x = 4
=> x = 1
3x + 2 - 5.3x = 36
=> 3x.9 - 5.3x = 36
=> 3x.(9 - 5) = 36
=> 3x.4 = 36
=> 3x = 36 : 4
=> 3x = 9 = 32
=> 3x = 2
Ta có : 3x + 3x + 1 = 36
=> 3x + 3x.3 = 36
=> 3x(1 + 3) = 36
=> 3x.4 = 36
=> 3x = 9
=> 3x = 32
=> x = 2
Vậy x = 2
3^x+3^x+1=36
3^x(1+3)=36
3^x=9
x=2