Tính a) (−1)^2; (−1)^3; (−1)^31. b) (−5).11.(−2)^3

* Hướng dẫn giải

1. Ta có: ${(-1)}^2$ = 1;

${(-1)}^3$ = −1;

${(-1)}^{31}$ = −1.

2. (−5).11.${\left(-2\right)}^3$ = (−5).11.(−8) = 440.