Question

[Linh Luna]

Tính

a, A= 3 × 5/4 - 3^2/4

b, B = -3/2 × (7/3 - 5/3 × 4)

c, C = -21/10 + 21/10 × 3/4 - 3/4

d, D= -2/3 +2 × (-2/5) × 3 -3

e, E= 3/4 × 8/9 × 15/16 ×...× 2499/2500

Answer 1

[Nguyễn Lê Phước Thịnh]

a: \(A=\dfrac{15}{4}-\dfrac{9}{4}=\dfrac{6}{4}=\dfrac{3}{2}\)

b: \(B=\dfrac{-3}{2}\cdot\dfrac{7-5\cdot4}{3}=\dfrac{-13}{-2}=\dfrac{13}{2}\)

c: \(C=\dfrac{-21}{10}\left(1-\dfrac{3}{4}\right)-\dfrac{3}{4}\)

\(=\dfrac{-21}{10}\cdot\dfrac{1}{4}-\dfrac{3}{4}\)

\(=\dfrac{-21}{40}-\dfrac{30}{40}=\dfrac{-51}{40}000000997\)

d: \(D=\dfrac{-2}{3}+\dfrac{-12}{5}-3=\dfrac{-10-36-45}{15}=\dfrac{-91}{15}\)