`3.(2x-1)^4 = 243`
`(2x-1)^4 = 243:3`
`(2x-1)^4 = 81`
`(2x-1)^4`\(=\left(\pm3\right)^4\)
`@TH1:`
`2x-1=3`
`2x=3+1`
`2x=4`
`x=4:2`
`x=2`
`@TH2:`
`2x-1=-3`
`2x=-3+1`
`2x=-2`
`x=-2:2`
`x=-1`
Vậy `x={-1;2}`
`3.(2x-1)^4 = 243`
`(2x-1)^4 = 243:3`
`(2x-1)^4 = 81`
`(2x-1)^4`\(=\left(\pm3\right)^4\)
`@TH1:`
`2x-1=3`
`2x=3+1`
`2x=4`
`x=4:2`
`x=2`
`@TH2:`
`2x-1=-3`
`2x=-3+1`
`2x=-2`
`x=-2:2`
`x=-1`
Vậy `x={-1;2}`
Tìm x, biết:
a) \(\dfrac{x}{3}\) - 5 = \(\dfrac{2x}{5}\)
b) 4 + 3x = 8 - x
c) 2 . 3\(^{x+1}\) - 5 . 3\(^x\) = 243
Tìm x biết: \(\frac{1}{3}.\left(2x-\frac{1}{2}\right)^4=\frac{1}{243}\)
tìm x
a.2^3+2=4^X+5
b.3^x+1=9^x
c.3^2x-1=243
Tìm x, biết :
a. 2x.4 = 16
b. 3x.3 = 243
1. Tìm số tự nhiên x biết 1) 3^x . 3=243 2) 7.2^x=56 3) x^3=8 4)x^20=x 5) 2^x-15=17 6) (2x+1)^3=9.81 7) x^6:x^3=115 8) ( 2x-15)^5=(2x-15)^3 9) 3^x+2-5.3^x=36 10) 7.4^x-1+4^x+1=23 Giúp tớ bài này với
1) 3x+4=243
2) (x-3)2=25
3) (2x-1)3=125
4)(2x-4).(3-x)=0
5)15-x=7-(-2)
6) /x-3/=7-(-2)
7) /x-5/=/-7/
a) 3^x+1 = 9
b) 6^x-1 =36
c) 3^2x+1 = 27
d) x^50 = x
e) 2^x : 4 = 32
f) 3^x : 3^2 = 243
g) 5^x-1 : 5 = 5^3
h) 4^2x-1 : 4 = 4
Giúp mình với nha !!!
Tìm x :
a) 32x = 243
b) 4x +1 = 32
(2x+1)^3-27=243^2:3^3
2x+2+2x+8=65:64
3*5x+^200-5*3x+98=70*125^40
11*3x+99-5*3x^962=81^40
70*4^2x+300+16x+148=140*4^300
Giup minh nha cac bam minh dang voi
32x + 1 = 243