Page 67 - aljaber

@ @¶ìÿa@óÝy‹¾a@ u@ @UT

: )7 53 )
:( )
(3 + 5)× 7 = 8 × 7 = 56 .(
(3 + 7)× 5 = 10 × 5 = 50
(7 + 5) × 3 = 12 × 3 = 36 (

.( ) . 36

BC = 4 AB = 10

10 − 4 ≤ AC ≤ 10 + 4

6 ≤ AC ≤ 14 ACD
AC = 6 AC

. 6 − 3 ≤ AD ≤ 6 + 3

.AD = 3 DA

:( ) ()

321 986

6

9

6321

8

.1 + 2 + 3 + 6 + 8 + 9 = 29