                                                      1

         2  0 2 

                      21.  

                             1.

     ࠡ   ⠢  ணࠬ    ᫥
㭪樨 :
                      A = x520 + 3x + cos x.

                             2.

     ᫨ 祭 㭪樨 :

                   B = x * d - (x/y + sin x).

                             3.

     । ࠤ 㣠  頤 S.

                             4.

     । ꥬ 㡠, 頤 ࠭ ண S.

                             5.

     ᫨ 祭 㭪樨 :
                      A = 27p0 * x * (x + b).
.
                   22.  

                             1.
     ஭ 㣮쭨: a, b, c.    ࠢ७.

                             2.
     ஭ 㣮쭨 a, b, c, d.    ࠫ-
ࠬ.

                             3.
     ࠡ     ⠢ ணࠬ  ।
㭪樨 Y,  㫠:

           ax520 + bx + c      a 7-0 0
     Y =
           bx520 - (1 + x)/c   a = 0

                             4.
     ࠡ     ⠢ ணࠬ  ।
㭪樨 Y,  㫠:

           a sin x + b cos x  a > 3
     Y =
           a cos x - b sin x  a < 3  a = 3

                             5.
     ஭ 㣮쭨: a, b, c. ।  ⨯: ࠢ-
७, ࠢ஭   ⭮騩   㯯.
.
                     23.  

                             1
     ⠢     ணࠬ   ᫥  뢮 
 ⠡ 祭 㭪樨 Y,  ᫨ ६   ᢮
祭  40  40  蠣 7D0:
                        Y = ax520 + bx + c.

                             2
     ⠢   ணࠬ  ᫥    뢮  
 ⠡ 祭 㭪樨 Y,  ᫨ ६   ᢮
祭  40  40  蠣 7D0:

           ax520 + bx + c  a > 0
     Y =
           ax520 + bx + c  a 7,0 0

                             3
     ⠢ ணࠬ   ᫥ 祭 㭪樨 :
                     5 0= cos5 0x5 0+5 0sin5 0x5 0+5 0x520,
 410=20, 420=25, 430=30.

                             4
     ⠢   ணࠬ  ᫥    -
 祭 頤 㣠, ᫨ ࠤ R  ᢮ 祭
 R40  R4K0  蠣 70R.

                             5
     ⠢    ணࠬ   ⢠ -
祭 70  ஬⪥  40  40.

