NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Mathematics
- Chapter
- Trigonometric Equations
NTA Abhyas 2020 · Mathematics · Trigonometric Equations
In the interval& (0, 2π) , sum of all the roots of the equation (π...
In the interval& , sum of all the roots of the equation \sin \left(\pi {~log}_{3} & \left(\dfrac{1}{\text{x}& }\right)\right) = 0is
Options
- A
- B
- C
- D
Correct answer
C.
Step-by-step solution
\pi { log}_{3} \left(\dfrac{1}{\text{x}}\right) = \text{k} \pi \text{,} \text{k} \in \text{I}\log_{3} \left(\dfrac{1}{\text{x}}\right) = \text{k} ⇒ \text{x} = {3}^{- \text{k}}k– 1, 0, 1, 2, 3, . . . . . . .
\text{S} =\left(3 + 1\right)
~
\text{S} =\left(3 + 1\right)
~