А={1, 2, 3, 4,} В = {7.8} C = {3, 7 } - id1416969620210508 от ShkolnikN15 08.05.2021 20:53

Question

Математика: А={1, 2, 3, 4,} В = {7.8} C = {3, 7 }​

ShkolnikN15 · Accepted Answer

1) -0,25 - (7b/12 - 1/4 )= - (b/6 + 5/12) + b  -0.25  - 7b/12 + 1/4  = - b/6  - 5/12 + b -0.25- 7b/12 + 0.25 = -  b/6 + 6b/6 - 5/12 -7b/12 - 5b/6 = - 5/12 -7b/12 - 10b/12 =- 5/12   - 17b/12 =  - 5/12         (*- 12) 17b=5 b= 5/17 Проверим: -0,25  - ( (7* 5/17 ) /12 - 1/4 ) = - ( 5/17 :6 + 5/12 ) + 5/17 -0,25 -   (( 35/17 * 1/12  ) - 1/4) = -  ( 5/102   + 5/12) + 5/17 -1/4 -   ( 35/204 -  51/204) = - (10/204 +  85/204) +  60/204 -51/204 - ( - 16/204) = -95/204 + 60/204 -35/204 = -35/204 2) (8-к)/4=...

А={1, 2, 3, 4,}В = {7.8}C = {3, 7 }​

MOGZ ответил

А={1, 2, 3, 4,}
В = {7.8}

C = {3, 7 }