Evaluate 2 1 frac 5 x dx - JAMB Mathematics 2018 Question
Evaluate ∫\(^2_1\) \(\frac{5}{x}\) dx
A
1.47
B
2.67
C
3.23
D
3.47
correct option: d
∫\(\frac{5}{x}\) dx = 5 ∫\(\frac{1}{x}\) = 5Inx
Since the integral of \(\frac{1}{x}\) is Inx
∫\(^2\) \(_1\)∫ \(\frac{5}{x}\) dx = 5
dx = 5 (In<2 – InIn1)
= 3.4657
= 3.47
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