Page 243 - aljaber

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−300 0( ) . 300 [MAΘ 2011] ( )
−100 ( )
400 ( ) 2 −200 ( )
.5 ()

5 2 ( ) 5 2 ( ) 1 2 ( ) 2 1 ()
20 [AHSME 1959] ( )

. 100 50

1() 3( ) 4( ) 5 ()

22 3 3
10
[MAΘ 2011] ( )
r
. 1000

r

7 () 6 ( ) 4 ( ) 3 ()
906 ( )
143 ( ) .a20 = 120 a8 = 4 {an } ( )

a8 + a9 + + a20

806 ( ) 706 ( ) 606 ( )

15 [MAΘ 2010] ( )

. 105

93 ( ) 90 ( ) 87 ( )

[MAΘ 2010] ( )