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= (34/100 * 10/1 - 0,4)³ - 0,8 * 0,8= 0,8
= (340/100 - 0,4)³ - 6,4 = (3,2/5 - 4/10)³ - 6,4 = -------
= (3,4/10 - 4/10)³ - 6,4 = 3 *3 *3 -6,4 6,4
= 27 - 6,4 = 21,6
2. 3,7 * (-1/2)² + [1/4 (4¹²) - (-0,2)³]* 2 = 3,7 * 1/4 + (1/48 - 0,2 * 0,2 * 0,2) *2 = 37/10 * 1/4 + (1/48 - 0,8) = 37/40 + (1/48 - 8/10) = 37/40 + ( 10/480 - 384/480) = 37/40 + (-374/480) = 37/40 - 374/480 = 444/480 - 374/480 = 70/480 = 35/240 = 7/48
48 12
* 8 * 4
---- ------
84 48
3. (- 0,5) * [(0,4)² + 0,04 + (-0,1)] : (-1/7)² = (-0,5) * [1,6 +0,04 + (-0,1)] ; 289/100 = [4/5 + 2/25 + (-0,1)] * 100/289 = [20/25
2/25 + (-1/10)] * 100/289 = [20/250 + (-25/250)] * 100/289 =
( -5/250) * 100/289 = (-500/17225) = (-100/3445) = (-20/689)