Question

tính:

a) (\(\dfrac{3}{7}\)+\(\dfrac{1}{2}\))\(^2\)

 

Answer 1

\(\left(\dfrac{3}{7}+\dfrac{1}{2}\right)^2=\left(\dfrac{3\cdot2+7}{14}\right)^2=\left(\dfrac{13}{14}\right)^2=\dfrac{169}{196}\)

Answer 2

\(\left[\dfrac{6}{14}+\dfrac{7}{14}\right]^2=\left[\dfrac{13}{14}\right]^4=\dfrac{169}{196}\)

Answer 3

\(\left(\dfrac{3}{7}+\dfrac{1}{2}\right)^2=\left(\dfrac{13}{14}\right)^2=\dfrac{169}{196}\)