Question

calculați:(1/2+1/5)×30/49+5/7; 2 1/2×4/25+7/15×3/14; (3 1/2-1 2/3)×36/55; 2/3 (1 1/5+2 1/2)-(1/2+1/4+1/3)​

Answer 1

Răspuns:

3 1 lc1 l a. 2 lc2 b. 1 2. Fig. 2.7 Arbore rezemat pe doi rulmenţi radiali-axiali, cu conducere ... 2,7- 3,5 2,5 1,5 V-4A 3,54,5 3,2 2 V-5A 4,55,5 4 2 V-6A 5,56,5 5 2 V- 7A 6,58,0 6 2 V-8A 8,09,5 7 2 ... -30 -49 15 26 49 g5 -4 -9 4 0 9 -5 -11 3 2 11 -6 - 14 2 3 14 -7 -16 3 3 16 -9 -20 ... 1,1 – 1,2 1,2 – 1,5 1,5 – 2,0 ... 25,4 25,4 25,4 25,4 1 ...