f′(x)=6x2≥0, with equality only at x=0, so f is strictly increasing, hence one-one.
As x→±∞, f→±∞, so range is R (onto).
Thus f is bijective: (A) and (C).
CUET UG 2023 — Mathematics Arithmetic
The quantity of water that must be added to 36 litres of milk at 221 litres for ₹ 120 so as to have mixture worth ₹ 36 for a litre is :
Held on 15 Jun 2023 · Verified 13 Jul 2026.
12 litres
10 litres
15 litres
20 litres
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