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@Apu
Note for OP
+solved @user to close the thread when your doubt is solved. Mention the user who helped you solve the doubt. This will be added to their stats.check the range of each function,
(2) is always positive, so can never map to a negative value, so can never map to the whole [-1,1] interval
same goes for (4) its always positive
now, for (1) its a polynomial of even degree, with coefficient of highest power positive, it goes to +infinity at both x -> +inf and -inf, its bound to have a minimum value, and its a continuous function, so it can never attain an arbitary large negative value
(3) goes to -inf as x-> -inf and +inf as x->inf, and is continuous, so it will definitely attain all real values
Ohhhh thx I get it
+solved @Akshat
+solved @Akshat
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