ajutati-ma va rog la ex 3 si 4
Răspunsuri la întrebare
Răspuns:3. a)-3)
b)-5)
c)-1)
d)-2)
4. a) 0
b) 4
c) 13
Explicație pas cu pas:
3. a) (2⁶)⁸ ÷ (2⁵)⁹= b) (2⁰+4¹+1⁴+0⁴)² ÷3= c) 3⁵-3²= d) (15+5²)ₓ2-8²=
=2⁶ˣ⁸÷2⁵ˣ⁹= =(1+4+1+0)² ÷ 3= =3³⁺² -3²= =(15+25)×2-64=
=2⁴⁸ ÷ 2⁴⁵= =6²÷3= =3²×3²-3²= =40×2-64=
=2⁴⁸⁻⁴⁵= =36÷3= =(3³-1)×3²= =80-64
=2³= =12 =(27-1)×9 =16
=8 =26×9=
=234
4. a) (2⁴×3⁸-3⁸)÷5-27³= b) [(17²-11ₓ3)÷8²+3×16]÷3=
=(16×6561-6561)÷5-19683= =[(289-33)÷64+48]÷13=
=(104976-6561)÷5-19683= =[256÷64+48]÷13=
=98415÷5-19683= =(4+48)÷13=
19683-19683 =52÷13=
=4
c)[12×15-(2⁴ₓ5⁴-98²)÷2²÷3²]÷13=
=[12×15-(16×625-9604)÷4÷9]÷13=
=[12×15-(10000-9604)÷4÷9]÷13=
=[12×15-396÷4÷9]÷13=
=(180-396÷4÷9)÷13=
=(180-99÷9)÷13=
=(180-11)÷13=
=169÷13=
=13