Question

calculati
3 la a cincea x 3 la a 7 : 3 la a 9 - (2 la a 6 )totul la a 3 : 2 la a 42

Answer 1

$3^{5+7} : 3^{9} - 2^{6*3} : 2^{42} = 3^{12} : 3^{9} - 2^{18} : 2^{42} = 3^{12-9} - 2^{18-42}$$3^{3}- 2^{-24} =27- \frac{1}{ 2^{24} }$

Answer 2

3^5 * 3^7 : 3^9 - (2^6)^3 : 2^42 =
= 3^(5+7-9) - 2^18 : 2^42
= 3^3 - 2^(18-42)
=27- 2^-24