**Logarithms RS Aggarwal ICSE** Class-9th Maths Solutions Goyal Brothers Prakashan Chapter-7. We provide step by step Solutions of Exercise / lesson-7 **Logarithms** for **ICSE** Class-9 **RS Aggarwal **Mathematics .

Our Solutions contain all type Questions with Exe-7 A, Exe-7 B with Questions to develop skill and confidence. Visit official Website **CISCE** for detail information about **ICSE** Board Class-9 Mathematics.

**Logarithms RS Aggarwal ICSE** Class-9th Maths Solutions Goyal Brothers Prakashan Chapter-7

**–: Select Topics :–**

### Introduction

Logarithms are the opposite phenomena of exponential like subtraction is the inverse of addition process, and division is the opposite phenomena of multiplication. Logs “undo” exponential.

There are a number of rules known as the laws of logarithms. These allow expressions involving

logarithms to be rewritten in a variety of different ways. The laws apply to logarithms of any base

but the same base must be used throughout a calculation

First Law

log A + log B = log AB

Second Law

log A − log B = log (A/B)

Third Law log An = n log A

log 1 = 0, logmM = 1

**Exercise- 7 A Logarithms RS Aggarwal ICSE** Class-9th Maths Solutions Goyal Brothers Prakashan

Question 1

convert each of the following into logarithm form

…………………………..

Answer

#### Question 2

convert each of the following into exponential form

#### Answer

#### Question 3

by converting into exponential form find value of each of following

#### Answer

#### Question 4

find value of x when

…………………………….

#### Answer

#### Question 5

if log…………. ……….show that…………….

#### Answer

#### Question 6

given log….. ………… =b

……………….

………………..

……………….. term of x and y

#### Answer

**RS Aggarwal ICSE** Class-9th Maths Solutions Goyal Brothers Prakashan **Exrcise- 7 B** **Logarithms **

Question 1

evaluate the following without using tables

…………..

…………

……………

…………….

…………….

Answer

#### Question 2

evaluate

………………………..

#### Answer

#### Question 3 and Question 4

3- express …………………….

#### Answer

#### Question 5

express ………………….as a single logarithms

#### Answer

#### Question 6

evaluate the following without using log tables

………….

……………..

…………….

…………

Answer

#### Question 7

given ……………..find value of

…………………..

……………………

…………………….

……………………

#### Answer

#### Question 8

if log 2 = 0.3010 find the value of ……………..

Answer

#### Question 9 to Question 11

if log 8 = 0.9010 find the value of

……………..

…………….

………………

#### Answer

#### Question 12

if log (m+n) = log m+log n show that ……………..

………………….

#### Answer

Question 13

solve for x

#### Answer

#### Question 14

if …………………find the value of n

#### Answer

#### Question 15

write the logarithmic equations for

………………..

………………….

Answer

–: End of **Logarithms RS Aggarwal ICSE** Class-9th Solutions :–

Return to – **RS Aggarwal Solutions for ICSE Class-9 Goyal Brothers Prakashan**

Thanks

Answers for logarithms are not given. Why?

not in syllabus

it is not in syllabus

Why are the Solutions not given here for this chapter?

not in reduced syllabus 2021-22

Sir it’s in the 9th syllabus kindly upload, since board is removed for 9th most schools have included logarithms.

very soon

Where is the 17 pg

Hello sir ,

This is Er. Daksh Amit sir

This comment is only for wrong answer given by you please correct that ans

Exercise 7 B. Question number 13 , sixth part vi

thanks for comment

update very soon as 2023-24 edition

due to pdf format there may take 1 week

thanks again

call if needed 8948221203