\(\frac{x}{10}=0,3\)
=> \(x=0,3\cdot10=3\)
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1) Tim x
3^x +3^x+1 +3^x+2=351
2) So sanh
a)25^15 va 8^10×3^30
b(0,1)^10 va (0,3)^20
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