Շաբաթվա առաջադրանք20․02-24․02

ա) F = √ (x – 1) + √(3 – x) ≥  0

√ (x – 1) ≥  0

x – 1 ≥  0

x ≥  1

√(3 – x) ≥  0

x – 3 ≥  0

x ≥  3

[1; 3]

բ) F = √ (x – 1) – √(3 – x) ≥  0

√ (x – 1) ≥  0

x – 1 ≥  0

x ≥  1

√(3 – x) ≥  0

x – 3 ≥  0

x ≥  3

[1; 3]

ա) x2 – 8x + 21 = (x2 – 24x + 16) + 5 = (x – 4) + 5

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