The integral $\int_{1}^{\mathrm{e}}\left\{\left(\frac{\mathrm{x}}{\mathrm{e}}\right)^{2 \mathrm{x}}-\left(\frac{\mathrm{e}}{\mathrm{x}}\right)^{\mathrm{x}}\right\} \log _{\mathrm{e}} \mathrm{xdx}$ is equal to:
$\frac{1}{2}-\mathrm{e}-\frac{1}{\mathrm{e}^{2}}$
$\frac{3}{2}-\frac{1}{\mathrm{e}}-\frac{1}{2 \mathrm{e}^{2}}$
$-\frac{1}{2}+\frac{1}{\mathrm{e}}-\frac{1}{2 \mathrm{e}^{2}}$
$\frac{3}{2}-\mathrm{e}-\frac{1}{2 \mathrm{e}^{2}}$
Correct Option: , 4
$\int_{1}^{\mathrm{e}}\left(\frac{\mathrm{x}}{\mathrm{e}}\right)^{2 \mathrm{x}} \log _{\mathrm{e}} \mathrm{x} \cdot \mathrm{dx}-\int_{1}^{\mathrm{e}}\left(\frac{\mathrm{e}}{\mathrm{x}}\right) \log _{\mathrm{e}} x \cdot d x$
$\operatorname{Let}\left(\frac{x}{e}\right)^{2 x}=t,\left(\frac{e}{x}\right)^{x}=v$
$=\frac{1}{2} \int_{\left(\frac{1}{e}\right)^{2}}^{1} d t+\int_{\mathrm{e}}^{1} d v$
$=\frac{1}{2}\left(1-\frac{1}{\mathrm{e}^{2}}\right)+(1-\mathrm{e})=\frac{3}{2}-\frac{1}{2 \mathrm{e}^{2}}-\mathrm{e}$
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All Study Material
- JEE Main
- Exam Pattern
- Previous Year Papers
- PYQ Chapterwise
- Physics
- Kinematics 1D
- Kinemetics 2D
- Friction
- Work, Power, Energy
- Centre of Mass and Collision
- Rotational Dynamics
- Gravitation
- Calorimetry
- Elasticity
- Thermal Expansion
- Heat Transfer
- Kinetic Theory of Gases
- Thermodynamics
- Simple Harmonic Motion
- Wave on String
- Sound waves
- Fluid Mechanics
- Electrostatics
- Current Electricity
- Capacitor
- Magnetism and Matter
- Electromagnetic Induction
- Atomic Structure
- Dual Nature of Matter
- Nuclear Physics
- Radioactivity
- Semiconductors
- Communication System
- Error in Measurement & instruments
- Alternating Current
- Electromagnetic Waves
- Wave Optics
- X-Rays
- All Subjects
- Physics
- Motion in a Plane
- Law of Motion
- Work, Energy and Power
- Systems of Particles and Rotational Motion
- Gravitation
- Mechanical Properties of Solids
- Mechanical Properties of Fluids
- Thermal Properties of matter
- Thermodynamics
- Kinetic Theory
- Oscillations
- Waves
- Electric Charge and Fields
- Electrostatic Potential and Capacitance
- Current Electricity
- Thermoelectric Effects of Electric Current
- Heating Effects of Electric Current
- Moving Charges and Magnetism
- Magnetism and Matter
- Electromagnetic Induction
- Alternating Current
- Electromagnetic Wave
- Ray Optics and Optical Instruments
- Wave Optics
- Dual Nature of Radiation and Matter
- Atoms
- Nuclei
- Semiconductor Electronics: Materials, Devices and Simple Circuits.
- Chemical Effects of Electric Current,