Page 165 - aljaber

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35 ( ) 30 ( ) 25 ( ) 20 ( )

3() 1 − x ≥ 1 (x − 1) x ()
23 3 0()
1( )
2( ) ()

, 9 < 2x + 1 < 17 4 <x −2 <8 3()
9() 7( ) ()
5( )
3 ()
x < 5 1.6 < x + 1 x ()

6( ) 5 ( ) 4 ( )

n 6912 < 4n3 < 13500

40 ( ) 27 ( ) 14 ( ) 13 ( )

x >y z ≠0 y >0 x >0 [AHSME 1951] ( )

:

x −z >y −z ( ) x +z >y+z ()

x >y () a < −c xz > yz ( )
bd
z2 z2 [AHSME 1967] ( )
dcba
bd ≠ 0
a ()
a ()
a a≤0 ( )

a ()