Page 43 - Bangladesh_classwiz_BOOK2018_rev_Neat

(Key log- =2===1a2==)

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4. ( ) = + − 4 − 8 dvskbwUi AšÍM©Z k Gi ‡h gv‡bi Rb¨ (−2) = 0 n‡e Zv ‡ei Ki‡Z
n‡e|

mgvavb- cÖ_‡g Gi ¯’‡j −2 Ges k Gi ¯’‡j ewm‡q wb‡P cÖ`wk©Z w¯Œ‡bi g‡Zv
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(−2) + (−2) − 4(−2) − 8 = 0
K¨vjKy‡jU‡i cÖ‡ek Kiv‡Z n‡e| Gici q ‡P‡c r evUb Pvcvi ci = Pvc‡j wb‡Pi w¯Œ‡bi g‡Zv
(k Gi gvb) Gi gvb cvIqv hv‡e| G‡¶‡Î Gi gvb = 2 .

(Keylog-
(p2)qd+[(p2)dp4(p2)p8Qr
0qr=)

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5. ( ) = − 6 + 11 − 6 dvskbwUi gvb Gi ‡h gv‡bi Rb¨ k~b¨ Zv ‡ei Ki‡Z n‡e|
mgvavb- cÖ_‡g K¨vjKy‡jU‡i w evUb ‡P‡c z (A) ‡P‡c Equation/Function mode G cÖ‡ek Ki‡Z
n‡e| Gici 2 evUb ‡P‡c Polynomial equation wbe©vPb K‡i 3 Pvc‡j wÎNvZ mgxKi‡Yi Rb¨ wb‡Pi
^
g‡Zv GKwU w¯Œb cÖ`wk©Z n‡e| Gic‡i µgvš‡q mgxKi‡Yi mnM¸‡jvi gvb cÖ‡ek Kiv‡Z n‡e| j¶Yxq ‡h, cÖwZwU
gvb cÖ‡ek Kiv‡bvi ci = evUb Pvc‡Z n‡e|
Gici µgvš^‡q = Pvc‡Z _vK‡j , I Gi gvb cvIqv hv‡e hv 1,3,2.
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1

(Key log- wz231=p6=11=p6====)
GB ai‡bi mgm¨vi mgvavb gv‡bi ZvwjKv e¨envi K‡iI Kiv hvq| Z‡e ‡m‡¶‡Î GKwU fv‡jv Abygv‡bi cÖ‡qvRb
nq| GB mgm¨vi ‡¶‡Î GKwU fv‡jv Abygvb n‡Z cv‡i −5 ≤ ≤ 5 Ges e¨eavb 1.

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