Question

\(\frac{1}{7}+\frac{1}{91}+\frac{1}{247}+\frac{1}{475}+\frac{1}{775}+\frac{1}{1147}\)

Thank cac ban

Answer 1

6/37 đúng đó

Ai tích mk mk sẽ tích cho

Answer 2

=\(\frac{6}{37}\)

Answer 3

6A=6.(1/1.7 + 1/7.13 + 1/13.19 + 1/19.25 + 1/25.31 + 1/31.37)

6A=6/1.7 + 6/7.13 + 6/13.19 + 6/19.25 + 6/25.31 + 6/31.37

6A=(1/1 - 1/7) + (1/7 - 1/13) + (1/13 - 1/19) + (1/19 - 1/25) + (1/25 - 1/31) + (1/31 - 1/37)            

6A=1/1 - 1/37 = 36/37

 A=36/37 : 6 = 6/37