Book: Mathematics Part-II
Chapter: 7. Integrals
Subject: Maths - Class 12th
Q. No. 8 of Exercise 7.10
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Evaluate the integrals using substitution.
Given: 
Let 2x = t ⇒ 2 dx = dt
When x = 1, t = 2 and when x = 2, t = 4
now, let 1/t = f(t)
then, f' (t) = -1/t2
because,
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