若3的x次方=243×9²,则x=()若xⁿ2,yⁿ=3则(xy)²ⁿ=
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若3的x次方=243×9²,则x=()若xⁿ2,yⁿ=3则(xy)²ⁿ=
若3的x次方=243×9²,则x=()若xⁿ2,yⁿ=3则(xy)²ⁿ=
若3的x次方=243×9²,则x=()若xⁿ2,yⁿ=3则(xy)²ⁿ=
若3的x次方=243×9²,则x=(9)
若xⁿ2,yⁿ=3则(xy)²ⁿ=36
若3的x次方=243×9²,则x=(9)若xⁿ2,yⁿ=3则(xy)²ⁿ=36
3的x次方=243×9²,则x=(9)若xⁿ=2,yⁿ=3则(xy)²ⁿ=(2×3)²=36
3的x次方=243×9²=3的5次方×3的4次方=3的9次方
所以
x=9
3的x次方=243乘9的平方
3^x=3^5*9^2
3^x=3^5*3^4
3^x=3^9
x=9