tìm n biết :\(\sqrt{1+2+3+...+\left(n-1\right)+n+\left(n-1\right)+...+3+2+1}\)=2010
9) Tìm n, biết :
\(\sqrt{1+2+3+...+\left(n-1\right)+n+\left(n+1\right)+...+3+2+1}\)
Chứng minh:
\(\sqrt{1^3+2^3+3^3+...+\left(n-2\right)^3+\left(n-1\right)^3+n^3}=1+2+3+...+\left(n-2\right)+\left(n-1\right)+n\)
Tìm GTLN
M=\(\frac{3\sqrt{x}+2010}{4\sqrt{x}+1}\)
N=\(\frac{13+3+\left|x-1\right|}{2.\left|1-x\right|+5}\)
tìm n:
\(\sqrt{1+2+3+...+\left(n-1\right)+n+\left(n-1\right)+...+3+2+1}\)=2015
tính A = \(\left[\sqrt{2}\right]+\left[\sqrt[3]{\frac{3}{2}}\right]+\left[\sqrt[4]{\frac{4}{3}}\right]+...+\left[\sqrt[n+1]{\frac{n+1}{n}}\right]\)
giúp mik với ạ.
chứng minh rằng: \(\sqrt{1+2+3+...+\left(n-1\right)+n+\left(n+1\right)+}...+3+2+1=n\) với n∈N
CMR:
\(\sqrt{1+2+3+...+\left(n-1\right)+n+\left(n-1\right)+...+3+2+1}=n\)
Tìm GTLN
M=\(\frac{3\sqrt{x+2010}}{4\sqrt{x}+1}\)
N=\(\frac{13+3\left|x-1\right|}{2\left|1-x\right|+5}\)
P=\(\frac{3\left|x\right|+4}{\left|x\right|+6}\)
làm hộ mik nha
ai nhanh mik tick cho