1.閱讀下列各式:(ab)
2=a
2b
2,(ab)
3=a
3b
3,(ab)
4=a
4b
4…
回答下列三個(gè)問(wèn)題:
(1)驗(yàn)證:(5×0.2)
10=
;5
10×0.2
10=
.
(2)通過(guò)上述驗(yàn)證,歸納得出:(ab)
n=
;(abc)
n=
.
(3)請(qǐng)應(yīng)用上述性質(zhì)計(jì)算:
①4
101×(0.25)
100;
②(-0.125)
2021×2
2020×4
2022.