Question

Cho cac so nguyen duong a,b,c,x,y,z

1, Biet 1/a = 3/b + c = 5/c + a. Hay rut gon phan so A = a/2b - c

2. Biet a/b = 2b/cc = 4c/a. Hay rut gon phan so B = ab + bc + ca/a² + b + c²

3. Biet x/a = y/b =z/c. Hay rut gon phan so C = x*y*z*(b+c)*(c+a)*(a+b)/a*b*c(y+z)*(z+x)*(x+y)

4. Biet ab/a + 2b = 2/5; bc/b + 2c = 3/4; ca/c +2a = 3/5. Hay rut gon phan so D = abc/ab+bc+ca

5. Biet 3/a -4b = 5c. Hay rut gon phan so E = 3bc + ab - 4ac/6bc - 8ac -ab

Giup minh nhe! Ai lam duoc va dung cho tick.

Thanks cac ban 

Answer 1

xin lỗi tớ ấn nhầm chỗ M=7 tớ làm lại rồi đó 

Answer 2

ban tra loi het cac cau hoi phia tren kia ho minh dc ko?