Dear Amitesh
In Integral Calculus, you must practice problems on 'Definite Integral' with a proper understanding of the use of their properties for evaluation.
question from the Leibnitz rule(differentiation under the intigral solution) are also very important.
as well as intigration with the help of reduction.( last year one question come based upon this concept).so you should learn all of these concept .
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Badiuddin