\(B=\dfrac{1}{25.27}+\dfrac{1}{27.29}+\dfrac{1}{29.31}+...+\dfrac{1}{93.95}\)

\(B=\dfrac{1}{2}.\left(\dfrac{1}{25}-\dfrac{1}{27}+\dfrac{1}{27}-\dfrac{1}{29}+\dfrac{1}{29}-\dfrac{1}{31}+...+\dfrac{1}{93}-\dfrac{1}{95}\right)\)

\(B=\dfrac{1}{2}.\left(\dfrac{1}{25}-\dfrac{1}{95}\right)\)

\(B=\dfrac{1}{2}.\dfrac{14}{475}\)

\(B=\dfrac{7}{475}\)

\(#NqHahh\)

\(S=1+3+3^2+3^3+...+3^{100}\)

\(3S=3+3^2+3^3+3^4+...+3^{101}\)

\(3S-S=\left(3+3^2+3^3+3^4+...3^{101}\right)-\left(1+3+3^2+3^3+...+3^{100}\right)\)

\(2S=3^{101}-1\)

\(S=\dfrac{3^{101}-1}{2}\)

\(#NqHahh\)

2(x - 51) = 36

x - 51 = 36 : 2

x - 51 = 18

x = 18 + 51

x = 69

\(\dfrac{5}{1}-\dfrac{2}{5}=\dfrac{25}{5}-\dfrac{2}{5}=\dfrac{23}{5}\)

 Her performance in that play put her on the map as a comedy actor.

\(+\) put -> puts

\(+\) HTĐ: S + V(s/es)

\(#NqHahh\)

\(7+\left(5x+2\right)=14\)

\(=>5x+2=14-7\)

\(=>5x+2=7\)

\(=>5x=7-2\)

\(=>5x=5\)

\(=>x=5:5\)

\(=>x=1\)

Vậy...

\(#NqHahh\)

\(4^x=64\)

\(4^x=4^3\)

\(\Rightarrow x=3\)

Vậy...

`#NqHahh`

\(2016:\left[25-\left(3x+2\right)\right]=3^2.7\)

\(2016:\left[25-\left(3x+2\right)\right]=9.7=63\)

\(25-\left(3x+2\right)=2016:63\)

\(25-\left(3x+2\right)=32\)

\(3x+2=25-32\)

\(3x+2=-7\)

\(3x=-7-2\)

\(3x=-9\)

\(x=\left(-9\right):3\)

\(x=-3\)

Vậy...

\(#NqHahh\)

Sky garden towers: Tháp vườn trên không.

What about eating out?