День: 7 апреля 2026

ա) S2025 = 6 (-1 — 1)/(-1 -1) = 6

բ) S2026 = 6(1 — 1)/(-1 — 1) = 0

ա) q = 27/-81 = — 1/3

S8 = -81 ((-1/3)⁸ — 1)/(-1/3 — 1) = — 1640/27

բ) q = 1/2 : 1 = 1/2

S8 = 1 ((1/2)8 — 1)/(1/2 — 1) = 255/128

գ) q = 2/(-1) = -2

S8 = -1 (256 — 1)/(-2 — 1) = 85

դ) q = -25/-125 = 1/5

S8 = -125 (1/390625 — 1)/(1/5 — 1) = — 97656/625

a1 = 5000

5000 x 40/100 = 2000

a2 = 5000 + 2000 = 7000

q = 7000/5000 = 7/5

S6 = 5000 ((7/5)⁶ — 1)/(7/5 — 1)

S6 = 51002000/625 = 81619.2

a1 = 50000

a2 = 45000

q = 45000/50000 = 45/50 = 9/10 = 0.9

S4 = 50000 (0.9⁴ — 1)/(0.9 — 1) = -17,195/-0.1 = 171,950

Վ — 1000000 x 10/100 = 100000

Լ — 1000000 x 20/100 = 200000

ա)

Վ — 100000 + 1000000 = 1100000

Լ — 200000 + 1000000 = 1200000

___

բ) 1100000 x 10/100 = 110000

1100000 + 110000 = 1,210,000

1210000 — 1200000 = 10000

Ալիկ՝

a1 = 5

5 x 10/100 = 0.5

a2 = 5 + 0.5 = 5.5

q = 5.5/5 = 1.1

Վիգեն՝

7 x 7 = 49

Ալիկ՝

S7 = 5 (1.1⁷ — 1)/(1.1 — 1) = 4.75/0.1 = 47.5

49 — 47.5 = 1.5

Պատ.՝ Վիգեն, 1.5 կմ — ով:

Revision of exam topics

Write down an essay on the topic: SOS – Save Our Space. We need your help to clean up our city. What have you ever done or are going to do to keep it clean?

SOS – Save Our Space. We need your help to clean up our city. What have you ever done or are going to do to keep it clean? — ~ Կարոլինա Եսայանի ուսումնական բլոգ ~

English Reading Text 20

——

According to Paragraph 1, lines 1-6,

a) most people say that red is their favourite colour

b) 8% of people say that there is something wrong with red

c) most people are fond of the blue colour

d) blue is not the sort of colour most people prefer

__

2. Most people don’t like the red colour because

a) it has negative emotional connotations

b) it is a dangerous colour

c) when we see this colour something bad happens

d) it’s difficult to see

___

3. It is stated in Paragraph 2, lines 7-9, that

a) when we see the red colour we remember the mistakes we made at school

b) our emotions are studied scientifically

c) because mistakes are usually corrected in red ink, we associate the colour with exams

d) if we see something red before an exam, we may perform badly

__

4. According to the text, the fact that red cars get more speeding tickets or are stolen more often

a) is because they cost more to insure

b) has not been proved

c) has been proved by plenty of evidence

d) is often referred to in myths and stories

__

5. According to the text, which of the following is NOT true?

a) the red colour is exciting and risky

b) the world would be a better place without the red colour

c) sports teams wearing red are more likely to win games

d) few people are confident enough to wear red