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Write in logarithmic form:
(a) `3^2 = 9`              (f) `5^3=125`
(b) `2^4 = 16`              (g) `10^0= 1`
(c) `3^3 = 27`              (h) `2^10 = 1024`
(d) `2^5 = 32`              (i) `a^n=b`
(e) `3^4 = 81`