\(27^{x-1}=9^2\)
\(\dfrac{27^x}{27}=\left(3^2\right)^2\)
\(27^x=3^4.3^3\)
\(\left(3^3\right)^x=3^7\)
\(3^{3x}=3^7\)
Suy ra 3x=7
\(x=\dfrac{7}{3}\)
\(27^{x-1}=9^2\)
\(\dfrac{27^x}{27}=\left(3^2\right)^2\)
\(27^x=3^4.3^3\)
\(\left(3^3\right)^x=3^7\)
\(3^{3x}=3^7\)
Suy ra 3x=7
\(x=\dfrac{7}{3}\)
\(27< 3^{x-2}< 243\) tim x
giup mk
\(5^{x-1}< 1000\) tim x
giup mk
tim x
\(2\cdot3^x=10\cdot3^{12}+8\cdot27^4\)
mk dang can gap giup mk nhe
tim x thuoc N
a,\(\dfrac{1}{4}\cdot\dfrac{2}{6}\cdot\dfrac{3}{8}\cdot...\cdot\dfrac{31}{64}=2^x\)
b,\(\left(x-3\right)^3=125^2\)
c,\(7^{x+2}+2\cdot7^{x-1}=345\)
d,\(3^{x-5}-81=0\)
bai hoi dai cac ban giup mk
(x-2)^3-27^2=0
tim x
27x-1=92 Tìm x
32 mũ 9 SS 18 Mũ 13
tìm x
( 2x - 1 ) 5 - 27 x ( 2x - 1 ) 2 = 0
ai giải giùm mk cái
Tim x \(\in\) N
a)\(^{3^{x-2}}\)
b)\(3.4^{x-2}\)=19.2
c)\(5^{x+1}+5^{x+2}\)=810
d)\(\left(x-1\right)^5-\left(x-1\right)^2=0\)
e)\(2^x-15=17\)
Cac ban oi cac ban lam giup minh voi mai minh phai nop bai roi
1, So sánh :
a, -28^27 và -27^28.
b, (-28)^27 và (-27)^28
c, -25^32 và -7 ^99
2, tìm x:
3^x +3-3^x =234
Help me ! mk cần gấp! Ai lm đúng thì tick luôn!