If 2 log x = 4 log 3, the x is equal to (a) 3 (b) 9 (c) 2 (d) none of these
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Answer:
(b) 9
Step-by-step explanation:
log x^2 = log 3^4
x^2=3×3×3×3
x^2 = 9^2
x=9
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