\(\dfrac{\left(3\cdot2^{20}+7\cdot2^{19}\right)\cdot52}{\left(13\cdot8^4\right)^2}=\dfrac{52\cdot2^{19}\cdot\left(3\cdot2+7\right)}{13^2\cdot2^{24}}\)
\(=\dfrac{2^{21}\cdot13\cdot13}{13^2\cdot2^{24}}=\dfrac{1}{2^3}=\dfrac{1}{8}\)
tinh gia tri bieu thuc ;
B=\(\dfrac{4^6.9^5+6^9.120}{-8^4.3^{12}-6^{11}}\)
tinh gia tri bieu thuc tai x=1 y=-1 z=3
xyz+2x^2y/y^2+1
tinh gia tri bieu thuc cua dai so x2y3 +xy tai x=1 va y=1/2
tinh gí tri bieu thuc:
D=\(\dfrac{4^6.9^5+6^9.120}{-8^4.3^{12}-6^{11}}\)
tim gia tri nho nhat cua bieu thuc : \(\left|x-2013\right|+\left|x-2014\right|+\left|x-2015\right|\)
Tinh gia tri h(x) voi x de da thuc :
\(\left(X+\dfrac{1}{2}\right)^2+1\)
Dat gia tri nho nhat
Tim gia tri nho nhat cua bieu thuc : A=\(\dfrac{21\left|4x+6\right|+33}{3\left|4x+6\right|+5}\)
Tim n nguyen de bieu thuc co gia tri nguyen :
A= \(\dfrac{3n+1}{n+1}\) ( voi n khac -1)
gia tri cua bieu thuc : B=\(\dfrac{-1:1\dfrac{1}{15}}{3\dfrac{1}{8}:6\dfrac{2}{3}}\): \(\dfrac{4\dfrac{7}{8}:13}{5:1\dfrac{7}{8}}\): \(\dfrac{1}{3^2}\)
