Tìm a biết : ( 1 – 1/3 ) x ( a – 1/6 ) x ( 1 – 1/10 ) x ( 1 – 1/15 ) x….x ( 1 – 1/780 ) x a = 1 13/10/2021 Bởi Raelynn Tìm a biết : ( 1 – 1/3 ) x ( a – 1/6 ) x ( 1 – 1/10 ) x ( 1 – 1/15 ) x….x ( 1 – 1/780 ) x a = 1
a=1