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3,5 + (1/27) * [(10/3) - 1] - 2 * (5/3) =
=(7/2) + (1/27) * (7/3) - (10/3) =
=(7/2) + (7/81) - (10/3) =
= (567/162) + (14/162) - (540/162) =
= (41/162)
b) 9 ˉ ¹ · 27 ˉ ² · √(9)⁴
__________________________ =
( 1/9 ) ²
(3²)₋¹ * (3³)₋² * (3^½)⁴
____________________ =
(3₋²)²
3₋² * 3₋⁶ * 3²
____________ =
3₋⁴
3₋⁶ / 3₋⁴ = 3₋² = 1/9
c) 25⁹ · x
_________________ = 5¹⁷ - 5¹⁶
125 ² · 25^ (-9/2)
(5²)⁹ * x
__________________ = 5¹⁷ - 5¹⁶
(5³)² * (5²)^ (-9/2)
5¹¹ * x
________ - 5¹⁷ + 5¹⁶ = 0
5⁶ * 5₋⁹
5¹¹ * x
________ - 5¹⁷ + 5¹⁶ = 0
5₋³
5¹⁴* x - 5¹⁷ + 5¹⁶ = 0
5¹⁴(x-5³+5²)=0 |: 5¹⁴
x-5³+5² = 0
x= 5³-5²
x=125-25
x=100