CONVERSION INTO EXPONENTIAL FORM -
Convert each of the following to exponential form –
i) log₂ 64 = 6
Ans.) 2⁶ = 64 (Ans.)
ii) log₁₀ 10000
Ans.) 10⁴ = 10000 (Ans.)
3
iii) log₃₂ 8 = -------
5
Ans.) (32)⅗ = (2⁵)⅗ = 2ᶾ = 8 (Ans.)
2
iv) log₁₂₅ 25 = -------
3
Ans.) (125) ⅔ = (5ᶾ)⅔ = 5² = 25 (Ans.)
v) log₁₀ (0.1) = - 1
Ans.) (10)ˉ¹ = 1/10 = 0.1 (Ans.)
By converting to exponential form, find the value of each of the following –
i) log₃ 243
Ans.) let log₃243 = x
Then, 3ˣ = 243 = 3⁵
So, x = 5 (Ans.)
1
ii) log₇ (--------)
343
1
Let, log₇ (-------) = x
343
1 1
Then, 7ˣ = -------- = --------
343 7ᶾ
Now, 7ˣ = 7ˉᶾ
So, x = - 3 (Ans.)
iii) log₂ (0.0625)
Let, log₂ (0.0625) = x
625 1 1
Then, 2ˣ = 0.0625 = --------- = -------- = -------
1000 16 2⁴
So, 2ˣ = 2ˉ⁴
Or, x = - 4
Or, log₂ (0.0625) = - 4 (Ans.)