Question

Exercitile 1 2 3 va rog cat mai repede

Answer 1

nu ma prea descurc la ex 3 b)

Answer 2

1) a) 3²·3⁵:3⁴=3⁷:3⁵=3²
b) 3⁷:3²:3=3⁽⁷⁻²⁻¹⁾ =3⁴
c) (3²)¹⁰=3²ˣ¹⁰=3²⁰
d)  (3²)²=3⁴
e) (3²)⁴:3⁶=3⁸:3⁶=3⁽⁸⁻⁶⁾=3²
f)  3¹¹x9³=3¹¹x(3²)³=3¹¹x 3⁶=3¹⁷

2) a) 8x2²⁴=2³x2²⁴=2²⁷
b) (2³)²:4²=2⁶:(2²)²=2⁶:2⁴=2²
c) 2x(2⁴-2³)=2x2³(2-1)=2x2³=2⁴
d)  4³x(2⁵)³=(2²)³x2¹⁵=2⁶x2¹⁵=2²¹

3)a)
3¹⁰⁵:(5²²¹:5²²⁰-2)⁴⁵:27²⁰=
=3¹⁰⁵:(5¹-2)⁴⁵:(3³)²⁰=
=3¹⁰⁵:3⁴⁵:3⁶⁰=
=3⁽¹⁰⁵⁻⁴⁵⁻⁶⁰⁾=
=3⁰=
=1

b)
4³:2²-18⁰ₓ[5¹⁰:5⁹-6²ₓ(7¹⁵:7¹³-7²)]=
=(2²)³:2²-1x[5¹-6²x(7²-7²)]=
=2⁶:2²-1x(5-6²x0)=
=2⁴-1x5=
=16-5=
=11