Page 33 - Bangladesh_classwiz_BOOK2018_rev_Neat

ïiæ, ‡kl Ges avc wba©viY Kiv n‡jv| wb‡Pi djvdj ‡_‡K ‡`Lv hv‡”Q ‡h, = 1 Gi Rb¨ dvskb `yBwUi gvb
mgvb| Z…Zxq w¯Œ‡b = 5.75 Gi gvb cix¶v Kiv n‡q‡Q|
j¶Yxq ‡h, ClassWiz G dvsk‡bi gv‡bi ZvwjKv ‰Zwi Kivi Rb¨ PjK wn‡m‡e ïaygvÎ Ges dvskb wn‡m‡e
I e¨envi‡hvM¨| myZivs Ab¨vb¨ PjK hy³ dvskb‡K Gi dvskb AvKv‡i cÖ‡ek Kiv‡Z n‡e| D`vniY¯^iƒc
ejv hvq , ℎ( ) = 5 + 7 ‡K Gi mgZzj¨ dvskb ( ) = 5 + 7 AvKv‡i cÖ‡ek Kiv‡Z n‡e| mKj
mvswL¨K gvb GKB _vK‡e; ïaygvÎ PjK Ges dvsk‡bi bvg cwieZ©b n‡e|

2.4 ‰iwLK Ges wØNvZ dvskb (Linear And Quadratic Function)
aiv hvK, GKwU GK NvZ wewkó dvskb hvi PjK¸‡jv GK NvZ m¤^wjZ| GLv‡b `yBwU D`vniY ‡`qv n‡jv -

( ) = 2 Ges ( ) = 7 − 3
gv‡bi ZvwjKv n‡Z ‡`Lv hvq, Pj‡Ki gv‡bi wbw`©ó cwieZ©‡bi mv‡_ mv‡_ dvsk‡bi gvb wbw`©ó cwigv‡Y e…w× A_ev
n«vm cvq| wb‡Pi `yBwU w¯Œ‡b evg cv‡k Ges Wvb cv‡k Gi gvb cÖ`wk©Z n‡q‡Q|

hLb Gi gvb 1 e…w× cvq, ZLb ( ) Gi gvb 2 K‡i e…w× cvq| GKB mv‡_ ( ) Gi gvb 3 K‡i n«vm cvq|
Dc‡ii w¯Œbk‡Ui ‡P‡q K¨vjKy‡jU‡i ZvwjKvi Dc‡iI wb‡P ‡M‡j GwU Av‡iv ®úó nq| ‡Kbbv Dc‡ii w¯Œbk‡U gvÎ
Pvi ‡Rvov gvb cÖ`wk©Z n‡q‡Q|
GB ai‡Yi ZvwjKv e¨envi K‡i Av‡iv `¶Zvi mv‡_ KvM‡R ‡jL wPÎ A¼b Kiv hvq|
GB c×wZ‡Z gv‡bi ZvwjKv GK NvZ (Linear) dvsk‡bi ‡jL wPÎ m¤ú‡K© aviYv Ki‡Z mvnvh¨ K‡i| GLv‡b ( )

GKwU µgea©gvb dvskb hvi Xvj 2| Aci w`‡K ( ) AwaK µgn«vmgvb dvskb hvi Xvj -3| wb‡Pi ‡jLwPÎ n‡Z
‡`Lv hv‡”Q ‡h, cÖ‡Z¨KwU dvskb‡K GKwU ‡iLvi gva¨‡g Dc¯’vcb Kiv hvq| GB Kvi‡Y G‡`i ‰iwLK (Linear)
dvskb ejv nq|

Dc‡ii ‡jL wPÎwU QR ‡Kv‡Wi gva¨‡g I‡qe mvBU n‡Z ‡ei Kivi Rb¨ QR ‡KvW ‡Rbv‡iUi A¨vc _vK‡Z n‡e|

cÖ_‡g gv‡bi ZvwjKv ‡ei Ki‡Z n‡e| Gici qT Pvc‡j K¨vjKy‡jUi GKwU QR ‡KvW cÖ`k©b Ki‡e|
¯§vU©‡dv‡bi gva¨‡g GB ‡KvWwU ¯‹¨vb Ki‡j CASIO Gi I‡qe ‡cB‡R ‡jLwPÎ Ges ‡mB mv‡_ dvskbwUi AviI
Ab¨vb¨ ‰ewkó¨ cÖ`wk©Z n‡e| ‡Lqvj ivL‡Z n‡e ‡h, ¯§vU©‡dv‡bi B›Uvi‡bU dvskb Pvjy Av‡Q wKbv|
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