Page 63 - aljaber
P. 63
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B,C ≤ 9 .A < 3
.111A > 192 .11B + C ≤ 99 + 9 = 108
.A ≥ 2
.11B +C = 78 A=2
.C = 1 B = 7
( ) ( ) () :( ) ( )
.1 1 = 1.2 =/ 5 .1.25 = 1 1 = 5
54 44
a a −b :( ) ( )
.b = −16 a = 12 . b
.a − b = 12 − (−16) = 28
:( ) ( )
.(1 + 3 − 4) + (2 + 5 − 6) = 0 + 1 = 1
:( ) ( )
39 = 3 × 13
51 = 3 ×17
77 = 7 × 11
91 = 7 × 13 17
. 51
:( ) ( )
.(2 ∗ 4) ∗ (1 ∗ 3) = 3 ∗ 3 = 4
:( ) ( )
5 − 4 + 6 × 3 = 1 + 18 = 19