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rishabh.mission
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Show that the function f: R ~ R defined by \[f(x) = 2x ^{2} -7 for x \in R is bijective.\]
Outkast3r09
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What is Risbijective?
rishabh.mission
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Sry!! "R is bijective "
shubhamsrg
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It is bijective when it is both one one(injective) and onto(surjective)
shubhamsrg
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You can verify with the graph.
shubhamsrg
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Or consult NCERT for theoretical proof.
shubhamsrg
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Haa mai hindi janta hu and can not send you message unless you've fanned me as according to your privacy setting.
rishabh.mission
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ok but bro mujhe realtion fuction nahi aata can u help me ???
shubhamsrg
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Bhai 2 saal pehle padha tha ye sab, but I can try to help.
rishabh.mission
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plz bhai jitna aata hai utna bata de kise mai iss chapter k Question kar saku ..
shubhamsrg
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Mai to is type ke ques hamesha graph se karta tha, tum bhi, graph se attempt kar sakte ho
warna NCERT to hai hi help ke liye.
rishabh.mission
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ok i'll try !! Abhi tu kya karta hia bhai ?
shubhamsrg
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Saal drop kiya, preparing for JEE, ISI, CMI etc
rishabh.mission
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ok mai bhi Improvent dunga !!
shubhamsrg
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Oh, aapne bhi drop kiya hai? hmm
lekin mai improvement nahi de raha .
rishabh.mission
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yep!!
n jee ki private coching le rahe ho kya ?
shubhamsrg
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hmm,sort of
mai yaha actually 1 remote area me hu, to bahut zyada facilities nahi hai, badi badi coachings nahi hai. Lekin 1 tuition liya hua hai. Tuition cum coaching.
rishabh.mission
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where are you from?
shubhamsrg
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Danapur(near patna)
rishabh.mission
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ok well im from Delhi .
shubhamsrg
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hmm.