b) B = 25 ( -1/3)^ 3 + 1/ 5 - 2. ( -1/2)^2 - 1/2
Giải thích
b) B=25.−133+15−2.−122−12 = 25.−127+15−2.14−12
= −2527+15−12−12=−250270+54270−135270−135270= −446270=−233135.
b) B=25.−133+15−2.−122−12 = 25.−127+15−2.14−12
= −2527+15−12−12=−250270+54270−135270−135270= −446270=−233135.