Q.

Find the range of the function f(x)=x+x2

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a

0,∞

b

R

c

0,∞

d

None of these

answer is A.

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Detailed Solution

f(x)=x+x2=x+|x|=x+x,x≥0x−x,x<0           =2x,x≥00,x<0⇒ f(x) takes values [0,∞)
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