\(2^m+2^n=2^{m+n}\)
\(\Rightarrow2^{m+n}-2^m-2^n=0\)
\(\Rightarrow\left(2^{m+n}-2^m\right)-\left(2^n-1\right)=1\)
\(\Rightarrow2^m\left(2^n-1\right)-\left(2^n-1\right)=1\)
\(\Rightarrow\left(2^m-1\right)\left(2^{n-1}\right)=1\)
\(\Rightarrow\left\{\begin{matrix}2^n-1=1\\2^m-1=1\end{matrix}\right.\)\(\Rightarrow m=n=1\)
Tim so tu nhien x khi chia cho 8, cho 10, cho 15 va cho 20 deu du 3. Biet rang x o trong khoang tu 230-300.
Giup mik vs, mik viet ko dau vi cai phan mem unikey bj j zui, mong cac bn thong cam, lam on, ngay mai nop ui bn, tang 2 tick
Cho cac so huu ti x=\(\frac{a}{b}\), y =\(\frac{c}{d}\)b>0,d>0 va cac so tu nhien m,n voi m ,n khac 0 CMR
\(\frac{a}{b}< \frac{c}{d}\) thi \(\frac{a}{b}< \frac{ma+nc}{mb+nd}< \frac{c}{d}\)
Tim tat ca cac so tu nhien n sao cho:
a,2.16>_2n>4
b,9.27<_3n<_243
tim cac so nguyen nuyen duong x,y,z biet rang :
x^3-y^3 -z^3 =3xyz va x^2 =2(y+z)
Bai 1 :cho A(x)=2x^2-8x
tim nghiem A(x)
b,tim B(x) biet B(x)=A(x)-3x+2x^2
c,tim ngiem B(x)
Bai2
Cho ham so y=f(x)=x+1
cac diem sau diem nao thuoc do thi ham so :A(0;1).B(1/2;-1). C(-1/2;0)
Tim x,y \(\in N\) biet 25-y2 = 8(x-2014)2
so cac gia tri n biet
A = \(\frac{8.n+193}{4.n+3}\)
tap hop cac gia tri n theo thu tu tang dan S\(\in\)..........
Số M được chia thanh 3 phần ti lệ với 0,5:\(\dfrac{1}{2}\) : \(2\dfrac{1}{4}\) . Tìm số M biet tong cac binh phương cua 3 phân số đó bằng 4660
Tim x thuoc N biet
( x - 2 ) ^2016 + ( x -3 ) = 1