3 public questions tagged with this topic.
The trick is after simplifying, 4 sq. unit is left. The method is simple: formula → substitution → calculation → answer.
Ref: NCERT Mathematics Class XII — Integrals
Understanding this is easy: solving fully: apply relevant formula, put numbers, compute. Result comes as _a^b x dy. Easy verification shows it satisfies condition.
Ref: NCERT Mathematics Class XII — Integrals
The trick is after simplifying, 2 is left. The method is simple: formula → substitution → calculation → answer.
Ref: NCERT Mathematics Class XII — Integrals
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