Evaluate the following integrals using the Fundamental Theorem of Calculus. \int_{0}^{\ln

prelimaf1

prelimaf1

Answered question

2021-11-21

Evaluate the following integrals using the Fundamental Theorem of Calculus.
0ln8exdx

Answer & Explanation

Froldigh

Froldigh

Beginner2021-11-22Added 17 answers

Step 1
We have to evaluate the integral using fundamental theorem of calculus:
0ln8exdx
We know the formula of integration through fundamental theorem of calculus,
exdx=ex+C
Applying above formula for the given definite integral, we get
0ln(8)exdx=[ex]0ln(8)
=[eln(8)e0]
Step 2
We know the property of exponential function,
eln(x)=x
e0=1
So applying above property for the above result, we get
0ln(8)exdx=eln(8)e0
=8-1
=7
Hence, value of the definite integral is 7.
Uersfeldte

Uersfeldte

Beginner2021-11-23Added 20 answers

Step 1: If f(x) is a continuous function from a to b, and if F(x) is its integral, then:
abf(x)dx=F(x)ab=F(b)F(a)
Step 2: In this case, f(x)=ex. Find its integral.
ex0ln8
Step 3: Since F(x)ab=F(b)F(a), expand the above into F(ln8)F(0):
eln8e0
Step 4: Simplify.
7

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