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Q.

⨍ :R→R,⨍ (x)=x2+4x+30x2-8x+18 is

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a

Many-one & onto

b

One-one & into

c

One- one & onto

d

Many-one & into

answer is D.

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Detailed Solution

⨍ (0)=3018=53=x2+4x+30x2-8x+18⇒x=0,x=26

⨍ (0)=⨍ (26)→⨍  is not one-one Let y=x2+4x+30x2-8x+18 disc0

y2-32y0y16-243,16+243 not onto.

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