Объяснение:

1.

а) 2×1,4^0 - 1,4² = 2 - 1,96 = 0,04

1,4^0 = 1

б) ( -5⁴/(-5)⁴ )⁴ = ( - 5⁴/5⁴)⁴ = (-1)⁴ = 1

в) (1 - 4/27 × (-3)²)³ = (1 - 4/27 × 9)³ = (1 - 4/3)³ = (3/3 - 4/3)³ = (-1/3)³ = - 1/27

2.

а) (х⁴×х²)³/х^17 = (х^6)³/х^17 = х^18/х^17 = х^18-17 = х¹ = х

б) (-1 2/7 ×а³bc^5)² = (- 9/7 × a³bc^5)² = 81/27a^6b²c^10

в) -(-2a⁴)³×2a⁴ = -(-8a^12) × 2a⁴ = 2³a^12 × 2a⁴ = 2⁴×a^16 = 16a^16

6. (-1)^n×(-1)^n×(-1)^n×(-1)n = (-1)^4n = ((-1)⁴)^n = 1^n = 1

3. (на фото)

5. (на фото)