1.

81 ^ { x - 2 } = 27 ^ { x + 1 }

Answer»

convert them to same base:81=(3)^427=(3)^3

so,3^[4(x-2)]=3^[3(x+1)]the base is equal so the powers should be equal.

4(x-2)=3(x+1)=>4x-2=3x+3=>4x-3x=3+2=>x=5 (answer)

wrong



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