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Answer to Sign–charts of Factorable Functions
(x – 2)(x + 3)
2
0
+ +– –1.
– –
–3
+ +
(x + 3)
(2 – x)2
0
+ + – ––33. –
–x (x + 3)
0
+ + – –5. –3
– 0
: where f = 0
(x + 3)2
+ +7. –3
0
+ +
+ + – –1/2 3
9. + + – – x (2x – 1)(3 – x)
0 + + – –1/2 3
11. – – x (2x – 1)(3 – x)
0 + +1/2 3
13. x (2x – 1)(3 – x)+ ++ + + +
–1 0 3
15. x2 (x – 3)(x + 1)+ + + +– –– –
: where f is UDF
Answer to Sign–charts of Factorable Functions
19. –2 + +3 4+ + – –
: where f = 0 : where f is UDF or excluded
– – (x – 4)(x + 2)
(3 – x)
(x – 2)(x + 3) ≥0
2
0
+ +21. –3+ +
(x + 3)
(2 – x)2
0 – ––323. –
–x (x + 3) ≤0
0
– –25. –3
– 0
x2 – 4 > 0
27. + +1/2 3
29.
+ + x (2x – 1)(3 – x) > 0
31.
≤0
(x – 3)(x + 1) > 0
3
0
+ +–1
+ +
2
0
+ +–2
+ +
33.
2
0
–3
UDF
UDF
– – (x + 3)
(x – 2)2
≤0
35. –2 3 4 – –– – (x – 4)(x + 2)
(3 – x)
≤0

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Answers sign-charts

  • 1. Answer to Sign–charts of Factorable Functions (x – 2)(x + 3) 2 0 + +– –1. – – –3 + + (x + 3) (2 – x)2 0 + + – ––33. – –x (x + 3) 0 + + – –5. –3 – 0 : where f = 0 (x + 3)2 + +7. –3 0 + + + + – –1/2 3 9. + + – – x (2x – 1)(3 – x) 0 + + – –1/2 3 11. – – x (2x – 1)(3 – x) 0 + +1/2 3 13. x (2x – 1)(3 – x)+ ++ + + + –1 0 3 15. x2 (x – 3)(x + 1)+ + + +– –– – : where f is UDF
  • 2. Answer to Sign–charts of Factorable Functions 19. –2 + +3 4+ + – – : where f = 0 : where f is UDF or excluded – – (x – 4)(x + 2) (3 – x) (x – 2)(x + 3) ≥0 2 0 + +21. –3+ + (x + 3) (2 – x)2 0 – ––323. – –x (x + 3) ≤0 0 – –25. –3 – 0 x2 – 4 > 0 27. + +1/2 3 29. + + x (2x – 1)(3 – x) > 0 31. ≤0 (x – 3)(x + 1) > 0 3 0 + +–1 + + 2 0 + +–2 + + 33. 2 0 –3 UDF UDF – – (x + 3) (x – 2)2 ≤0 35. –2 3 4 – –– – (x – 4)(x + 2) (3 – x) ≤0