Question

tính 

a. (7mũ 60 : 7 mũ 14 ) : 7 mũ 12

b. (5 mũ 32.5 mx 19 ) : ( 5 mũ 48.25)

c. (11 mũ 154 - 11 mũ 152) : 11 mũ 152

Answer 1

a) \(\left(7^{60}:7^{14}\right):7^{12}\)

\(=7^{46}:7^{12}=7^{34}\)

b) \(\left(5^{32}.5^9\right):\left(5^{48}.25\right)\)

\(=\left(5^{32}.5^9\right):\left(5^{48}.5^2\right)\)

\(=5^{41}:5^{50}=-\left(5^9\right)\)

c) \(\left(11^{154}-11^{152}\right):11^{152}\)

= \(\left(11^{152}.121-11^{152}\right):11^{152}\)

=\(\left[11^{152}.\left(121-1\right)\right]:11^{152}\)

= \(11^{152}.120:11^{152}\)

= \(120\)