5a+2b, при a=7/15 и b=-5/6
Решите задачу:
5а+2b = 5•7/14 +2•-5/6 = 35/14 -10/6 = 41/84 - 24/84 = 17/84
Соре, ща исправлю
5•7/15 + 2• (-5/6) = 35/15 - 10/6 = 70/30 - 50/30 = 20/30=2/3