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Bài 19: TÍnh
a) $2^{5}$;
b) $(-5)^{3}$;
c) $0.4^{3}$;
d) $(-0.4)^{3}$;
e) $(\frac{1}{2})^{5}$;
g) $(\frac{-1}{3})^{4}$;
h) $21.5^{0}$;
i) $(3\frac{1}{2})^{2}$.
a) $2^{5}$ = 2*2*2*2*2 = 32;
b) $(-5)^{3}$ = (-5)*(-5)*(-5) = -125;
c) $0.4^{3}$ = 0.4*0.4*0.4 = 0.064;
d) $(-0.4)^{3}$ = (-0.4)*(-0.4)*(-0.4) = -0.064;
e) $(\frac{1}{2})^{5}$ = $\frac{1}{2}$*$\frac{1}{2}$ = $\frac{1}{32}$
g) $(\frac{-1}{3})^{4}$ = $\frac{-1}{3}$*$\frac{-1}{3}$*$\frac{-1}{3}$*$\frac{-1}{3}$ = $\frac{1}{81}$
h) $21.5^{0}$ = 1
i) $(3\frac{1}{2})^{2}$ = $(\frac{7}{2})^{2}$ = $\frac{7}{2}$*$\frac{7}{2}$ = $\frac{49}{4}$
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