**S Chand ICSE Mathematics Class 9 Solution Seventh Chapter Logarithms Exercise 7A**

**(1) Give an equivalent exponential form for each statement:**

**(i) log _{2} 8 = 3**

**(ii) log _{3} 81 = 4**

**(iii) log _{2} ½ = -1**

**(iv) log _{5} 1/25 = -2**

**(v) ½ = log _{4} 2**

**(vi) 1/3 = log _{27 }3**

**Solution: **

**(2) Give an equivalent logarithmic form for each statement**

**(i) 16 = 2 ^{4}**

Or, log_{2 }16 = 4

**(ii) 25 = 5 ^{2}**

Or, log_{5} 25 = 2

**(iii) 81 = 3 ^{4}**

Or, log_{3} 81 = 4

**(iv) 6 ^{0} = 1**

**(v) 8 ^{1/3}**

**(vi) 1/9 = 3 ^{-2}**

**(vii) 1/32 = 2 ^{-5}**

**(viii) 10 ^{1.4969} = 31.4**

**Solution: **

**(3) Find the value of each logarithms given below:**

**(v) log _{10} 100 = x**

Or, 10^{x} = 10^{2}

X = 2

**(vi) log _{2} 0.5 = x**

2^{x} = 0.5 = 5/10 = ½ = 2^{-1}

**(5) log _{10}x = a**

10^{a} = x (True)

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Ok

Please provide chapter 6th Indicis / constant

please provide 6 th chapter

Sir please provide unit 3 geometry except chapter 7 because it is provided here