Các câu hỏi tương tự
Tìm số nguyên x ,nếu biết
\(3^x=9^{-6}.27^{-5}.81^8\)
\(2^x=8^3.8^{-10}.8^3\)
\(2^x=\frac{4^7}{8^3}\)
1 tim cac so nguyen x,y biet x/7=6/21 -5/y=20/28 1/2=x/12 x/8=-28/32 3/y=12/24 3/4=15/y 2 viet 3 phan so bang phan so -10/15
tim cap so x,y nguyen biet :
a,\(|2x+3|+|2x-1|=\frac{8}{2|x-5|+2}\)
CMR
a, 10^+10^8+10^7 chia het cho 222
b, 81^7-27^9-9^13 chia het cho 45
tim x thuoc Q biet
a,{x+1} {x-2} < 0
b, {x-2} {x + 0,5} nhỏ hơn 0
tim x nguyen duong biet 1/x(x+3)+1/(x+3)(x+6)=3/8
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
1)tim x biet rang:
a)3^x-1=1/243
b)2^x+2^x+3=144
c)81^-2x.27x=9^5
2)tim tiep so ghang thu 5 cua day so sau:-1/a^2;2/a^3;-6/a^4;24/a^5;...
3)tim so tu nhien x biet :
a)4^x+4^x+3=4160
b)2^x-1+5.2^x-2=7/32
gia tri (x) :1 2 3 a 5 6 7 8 9 10
tan so(n) ;2 3 1 6 3 1 4 2 1 2 /N=25
biet so trung binh cong la 5,16 . tim a
giup minh voi
1)tim x bit a)(1/2-1/3).6^x+6^x+2=6^15+6^18
b)3^x+3^x+2=2430
c)(2x-15)^5=(2x-15)^3
2) so saanh
a)2^11 va 5^35
b)2^31 va 3^21
c)2^15 va 27^5.49^8 d)21^15 va 27^5.49^8