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- 12) a) [(1/29)².(1/29)³]¹/⁵
- [(1/29)⁵]¹/⁵
- 1/29
- b) [(3/14)⁵:-(3/14)³]⁻¹
- [(3/14)²]⁻¹
- (3/14)⁻²
- (14/3)²
- 196/9
- c) a³.a⁷.a⁻³.a⁵/a⁴.a⁶.a⁻⁸.a⁹
- a¹²/a¹¹
- a¹
- 13) a) 3x-2≤4
- 3x≤4+2
- 3x≤6
- x≤2
- b) -3x+2≥4
- -3x≥4-2
- -3x≥2
- x≤2/3
- c) 4(5x-3)≤104-9x
- 20x-12≤104-9x
- 20x-9x≤104+12
- 29x≤116
- x≤4
- d) 5x/3-1/6≤x/4-4
- 20x-2≤3x-48
- 20x-3≤-48+2
- 17x≤-46
- x≤-46/17
- e) 3x+5>4-7x
- 3x+7x>4-5
- 10x>-1
- x>-1/10
- f) 1-2x>2x-1
- -2x-2x>-1-1
- -4x>-2
- x<1/2
- g) 3(4-x)≥18x+5
- 12-3x≥18x+5
- -3x-18x≥5-12
- -21x≥-7
- x≤1/3
- h) 5x-6/4≥3x-12
- 5x-6≥12x-48
- 5x-12x≥-48+6
- -7x≥-42
- x≤6
- 14) a) x = h.2
- b)
- c)
- d)
- 15) a con 3
- b con 4
- c con 5
- d con 1
- e con 2
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