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Mathematics

Convert the following into exponential form:

(i) log232 = 5

(ii) log381 = 4

(iii) log313\dfrac{1}{3} = -1

(iv) log84 = 23\dfrac{2}{3}

(v) log832 = 53\dfrac{5}{3}

(vi) log10 (0.001) = -3

(vii) log2 0.25 = -2

(viii) loga (1a)\Big(\dfrac{1}{a}\Big) = -1

Logarithms

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Answer

(i) log232 = 5

⇒ 25 = 32

(ii) log381 = 4

⇒ 34 = 81

(iii) log313\dfrac{1}{3} = -1

⇒ 3-1 = 13\dfrac{1}{3}

(iv) log84 = 23\dfrac{2}{3}

(8)23(8)^{\dfrac{2}{3}} = 4

(v) log8 32 = 53\dfrac{5}{3}

(8)53=32(8)^{\dfrac{5}{3}} = 32

(vi) log10 (0.001) = -3

⇒ 10-3 = 0.001

(vii) log2 0.25 = -2

⇒ (2)-2 = 0.25

(viii) loga (1a)\Big(\dfrac{1}{a}\Big) = -1

⇒ a-1 = 1a\dfrac{1}{a}.

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