Question

[Nguyễn Minh Dương]

a) (14¹⁹ - 14¹⁸ ) : ( 14⁵ . 14¹² )              b) ( 2⁴¹ + 3⁸ ) . ( 10⁷ - 2⁷ ) . (2⁴ - 4² )

HELP ME !

Answer 1

[cụ nhất kokushibo]

c n m to ớp s á

áuơánààyái

Answer 2

[Nguyễn Gia Khánh]

a)

   \(\left(14^{19}-14^{18}\right)\div\left(14^5\times14^{12}\right)\)

\(=\left(14^{19}-14^{18}\right)\div14^{17}\)

\(=\left(14^{19}-14^{18}\right)\times\dfrac{1}{14^{17}}\)

\(=\dfrac{14^{19}-14^{18}}{14^{17}}=\dfrac{14^{18}\times\left(14-1\right)}{14^{17}}\)

\(=14\times13=182\)

b)

   \(\left(2^{41}+3^8\right)\times\left(10^7-2^7\right)\times\left(2^4-4^2\right)\)

\(=\left(2^{41}+3^8\right)\times\left(10^7-2^7\right)\times\left(2^4-2^4\right)\)

\(=\left(2^{41}+3^8\right)\times\left(10^7-2^7\right)\times0\)

\(=0\)