(2x+1)^3=125
(2x-1)^4=16
6.3^x-2.3^x=36
2^x+1-2^x=32
Những câu hỏi liên quan
a)5^x+1=125
b)5^2x-3-2.5^2=5^2.3
c)4^x.3=16
bài 1 tìm x biết
a)(-2/3)^2.x=(-2/3)^5
b)(-1/3)^3.x=1/81
c)(x-1)^3=27
d)(2x+1)^2=25
e)(2x-3)^2=36
f)5^x+2=625
g)(x-1)^x+2=(x-1)^x+4
h)(2x-1)^3=-8
k)1/4.2/6.3/8.4/10.5/12....30/62.31/64=2^x
bai2 tim so nguyen duong n biet
a)32<2^n<128
b)2,16>=2^n>4
c)9,27<=3^n<=243
Rút gọn :
1. (2x-5)(3x+1)-(x-3)^2+(2x+5)^2-(3x+1)^3
2. (2x-1)(2x+1)-3x-2)(2x+3)-(x-1)^3+(2x+3)^3
3. (x-2)(x^2+2x+4)-(3x-2)^3+(3x-4)^2
4. (7x-1)(8x+2)-(2x-7)^2-(x-4)^3-(3x+1)^3
5. (5x-1)(5x+1)-(x+3)(x^2-3x+9)-(2x+4)^2-(3x-4)^2+(2x-5)^3
6. (4x-1)(x+2)-(2x+5)^2-(3x-7)^2+(2x+3)^3=(3x-1)^3
1: \(=6x^2+2x-15x-5-x^2+6x-9+4x^2+20x+25-27x^3-27x^2-9x-1\)
=-27x^3-18x^2+4x+10
2: =4x^2-1-6x^2-9x+4x+6-x^3+3x^2-3x+1+8x^3+36x^2+54x+27
=7x^3+37x^2+46x+33
5:
\(=25x^2-1-x^3-27-4x^2-16x-16-9x^2+24x-16+\left(2x-5\right)^3\)
\(=8x^3-60x^2+150-125+12x^2-x^3+8x-60\)
=7x^3-48x^2+8x-35
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(2+√3)2x=2-√3
b) 2x2-3x+2=4
c) 2.3x+1-6.3x-1-3x=9
d) log3(3x+8)=2+x
1. 2 mũ x=16
2. 2 mũ 2x-1=2 mũ 7
3. 7 mũ 2x-3
4. (-6) mũ 2x+2=1/36
5. 4 mũ x=32 mũ 24
6. 2 mũ 7x+4=32 mũ 12
giải giúp mình vs nhé mấy bợn~
1. 2x=16\(\Rightarrow\)X=4
2. 22x-1=27
\(\Rightarrow\)27=22.4-1
Vậy x =4
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Bài 1:
a) 3^x=9
b) 5^x=125
c) 3^x+1=9
d) 6^x-1=36
e) 3^2x+1=27
f) x^50=x
Bài 2:
a) 2^x :4=32
b)3^x:3^2
c)5^x-1:5=5^3
d)4^2x-1:4=4^4
Bài 3:
a) (2x+1)^3=27
b) 4x^3+15=47
Tính:
a) \(({x^2} - 2x + 1):(x - 1)\);
b) \(({x^3} + 2{x^2} + x):({x^2} + x)\);
c) \(( - 16{x^4} + 1):( - 4{x^2} + 1)\);
d) \(( - 32{x^5} + 1):( - 2x + 1)\).
Vậy \(( - 32{x^5} + 1):( - 2x + 1) = 16{x^4} + 8{x^3} + 4{x^2} + 2x + 1\).
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1:Tìm x, biết:
a) (3/5)^2x-1 = 125/27
b)1/2+(1/2.3)+(1/3.4)+...+(1/2015.2016)-2x=1/2-1/2016
c)/2x^2+/x-2//=2x^2+3
Tìm x, biết:
a, (3/5)^2x-1=125/27
b,1/2+1/2.3+1/3.4+...+1/2015.2016 - 2x=1/2-1/2016
c,/2x^2+/x-2//=2x^2+3