Question

ex 21 si 22 ca rog dau coroana

Answer 1

21.
a=(3⁵)⁷-2×9¹⁷ =3³⁵-2×3³⁴ =3³⁴(3-2)=3³⁴
b=[3×(2⁹)⁴-2³⁷]:4=[3×2³⁶-2³⁷]:2²=2³⁶(3-2):2²=2³⁶:2²=2³⁴    
deci a>b

22
a) (7+2³×2⁶+2⁵⁶:2²⁶):[2¹⁵:2⁶+(2⁶)⁵+7]=(7+2⁹+2³⁰):(2⁹+2³⁰+7)=1 deci adevarat
b) 6×7²⁴<6²⁵    
    7²⁴<6²⁴     fals
 c)(2⁴-3×2⁹+2¹²:16:(1-3× 2⁵+2⁸)=(2⁴-3×2⁹+2¹²):2⁴:(1-3×2⁵+2⁸)=
=(1-3×2⁵+2⁸):2⁴:(1-3×2⁵+2⁸)=1  deci adevarat