Question

18. Calculaţi: a) (5⁰ +5¹ +5² +5³): 2²; c) (2⁰+2¹+2²+2³+3²): 2²; b) (7⁰ +7¹ +7²-3²): 2⁴; d) (3⁰ +3¹ +3² +3³-2³): 2³.​

Answer 1

Răspuns:

a) (5⁰+5¹+5²+5³)÷2²=39

5⁰=1

5¹=5

5²=25 125+25+5+1+0=156

5³=125. 156÷2²=39

b) (7⁰+7¹+7²-3²)÷2⁴=3

7⁰=1

7¹=7. 40+7+1=48

7²-3²=40. 48÷2⁴=3

c)(2⁰+2¹+2²+2³+3²)÷2²=6

2⁰=1

2¹=2

2²=4

2³=8. 9+8+4+2+1=24

3²=9. 24÷2²=6

d) (3⁰+3¹+3²+3³-2³)÷2³=4

3⁰=1

3¹=3

3²=9. 19+9+3+1=32

3³-2³=19. 32÷2³=4