Page 36 - Bangladesh_classwiz_BOOK2018_rev_Neat

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gv‡bi ZvwjKv wØNvZ Ges wÎNvZ dvsk‡bi g‡a¨I Zyjbv Ki‡Z mvnvh¨ K‡i| D`vniY¯^iƒc `yBwU dvskb ( ) =
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Ges ( ) = hw` GKB ‡Wv‡g‡bi wfZ‡i gv‡bi ZvwjKvi w`‡K fv‡jvfv‡e j¶¨ Kiv nq, Zvn‡j ‡`Lv hv‡e ‡h,
0 < < 0.5 Gi wfZi wØNvZ dvsk‡bi ‡P‡q wÎNvZ dvskb axi MwZ‡Z e…w× cÖvß n‡”Q Ges 1 < < 2 Gi ‡fZi
`ªæZ MwZ‡Z e…w×cÖvß n‡”Q| GB cv_©K¨ Abyaveb Kivi Rb¨ aiv hvK, 0 < < 1Gi Rb¨ gv‡bi ZvwjKv-

j¶bxq ‡h 1 < < 2-Gi wfZ‡i wb‡Pi ZvwjKv‡Z gvb¸‡jv wfbœiKg| G‡¶‡Î wÎNvZ dvsk‡bi gvb wØNvZ
dvsk‡bi ‡P‡q `ªæZ e…w× cv‡”Q|

Dfq dvsk‡bi ‡jLwPÎ mij‰iwLK bq, eis eµ‡iLv| wKš‘ eµ‡iLv¸‡jv GKwU n‡Z Ab¨wU Avjv`v| wb‡Pi
‡jLwP‡Î GB ‰ewk󨸇jvI ¯úó|

2.6 g~j` (Rational) dvskb

g~j` dvskb n‡jv fMœvsk AvKv‡ii dvskb hvi n‡i GKwU PjKhy³ ivwk _v‡K|

g~j` dvskb GKB c×wZ‡Z ch©‡e¶Y Kiv hvq| g~j` dvsk‡bi `yBwU D`vniY we‡ePbv Kiv hvK,

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( ) = Ges ( ) = 1
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gv‡bi ZvwjKv ‰Zwi Ki‡j GKwU wbw`©ó ‰ewkó ‡hLv‡b n‡ii gvb k~b¨, Zv mv‡_ mv‡_B ¯úó n‡q hvq| G‡¶‡Î ( )
Gi ZvwjKvq = 0 Ges ( ) Gi ZvwjKvq = 1 AšÍf©y³|

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