f(3x)=log2根号下9x+5/2 则f(1)等于

数学人气：903 ℃时间：2020-03-04 23:12:48

优质解答

f(3x) = log2 根号[(9x+5)/2] = log2 根号{3*(3x) + 5]/2}
f(x) = log2 根号[(3x+5)/2]
f(1) = log2 根号[(3*1+5)/2] = log2 根号4 = log2 (2) = 1

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