Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Please solve RD Sharma class 12 chapter 20 Areas of Bounded Region exercise multiple choice question 1 maths textbook solution

Please solve RD Sharma class 12 chapter 20 Areas of Bounded Region exercise multiple choice question 1 maths textbook solution

Answers (1)

Answer:

 1(b)

Hint:

 Make the graph of 2kx and then apply integration

Given:

 y=2^{kx} \text { and } x=0, \quad x=2 \text { is }\frac{3}{log_{e}2}

Explanation:

Area of the bounded region

=\int_{0}^{2}2^{kx}dx

\begin{aligned} &\frac{3}{log_{e}2}=\int_{0}^{2}2^{kx}dx \\ &\frac{3}{log_{e}2}=\left [ \frac{2^{kx}}{log_{e}2} \right ]_{0}^{2} \\ &3=\left [ 2^{kx} \right ]_{0}^{2} \\ &3=(2^{k})^{2}-(2^{k})^{0} \\ &3=2^{2k}-1 \end{aligned}                                \begin{aligned} &\left [ \because \int a^{x}dx=\frac{a^{x}}{log_{e}a} \right ] \\ &\left [ \because a^{0}=1 \right ] \end{aligned}

\begin{aligned} &4=2^{2k} \\ &2^{2}=2^{2k} \\ &2k=2 \\ &k=1 \end{aligned}

Posted by

Gurleen Kaur

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE Class 12 re-evaluation portal faces technical glitch, services to resume by 2 pm
anam-khan

CBSE extends deadline to download Class 12 answer sheets till May 23; re-evaluation from May 26
anam-khan

‘Try again in sometime’: CBSE claims re-evaluation facility functioning properly; students flag login issues

Latest Question