Question 2 - Finding point when tangent is parallel/ perpendicular - Chapter 6 Class 12 Application of Derivatives
Last updated at April 16, 2024 by Teachoo
Finding point when tangent is parallel/ perpendicular
Question 2
Deleted for CBSE Board 2025 Exams
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Chapter 6 Class 12 Application of Derivatives
Concept wise
- Finding rate of change
- To show increasing/decreasing in whole domain
- To show increasing/decreasing in intervals
- Find intervals of increasing/decreasing
- Finding slope of tangent/normal
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Finding point when tangent is parallel/ perpendicular
- Finding equation of tangent/normal when point and curve is given
- Finding equation of tangent/normal when slope and curve are given
- Finding approximate value of numbers
- Finding approximate value of function
- Finding approximate value- Statement questions
- Finding minimum and maximum values from graph
- Local maxima and minima
- Minima/ maxima (statement questions) - Number questions
- Minima/ maxima (statement questions) - Geometry questions
- Absolute minima/maxima
Transcript
Question 2 Find the point at which the tangent to the curve 𝑦 = √(4𝑥−3)−1 has its slope 2/3 . Given, Slope of the tangent to the curve is 2/3 We know that Slope of tangent = 𝒅𝒚/𝒅𝒙 2/3 = 𝑑𝑦/𝑑𝑥 𝑑𝑦/𝑑𝑥 = 2/3 𝑑(√(4𝑥 − 3) − 1)/𝑑𝑥 = 2/3 1/(2√(4𝑥 − 3)) ×4−0 = 2/3 2/√(4𝑥 − 3) = 2/3 3 = √(4𝑥−3) √(𝟒𝒙−𝟑) = 3 Squaring both sides 4x − 3 = 9 4x = 12 x = 3 Finding y for x = 3 𝑦=√(4𝑥−3) − 1 =√(12−3)−1 =√9−1 =3−1 =𝟐 Hence, the required point is (𝟑, 𝟐)
