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18. X+Y=2 olduğuna göre 34 3y X+- 4 ifadesinin değeri kaçtır? A) 3 B) 4 C) 5 D) 6 E) 7​

Sagot :

Cevap:

a. x

3

+ 2 – 1 = –4 → x + 2 =–9 → x = –11

b. x

2 – x

3 = 2

1 → x

6

= 1

2

→ x = 3

c. x 3

21

– = 7 → x – 3 = 3 → x = 6

d. 2x

1 – 3x

1 = 24

1 → 1

6x = 1

24 → x = 4

e. 3( x

2 – 1) = x

2

3 – 4 + 1 → 3x

2

– 3 = 3x

2

–3

x, bütün reel sayılara eşittir.

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