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ǰλãҳ >> 1X9=10һ1=9,2X9=20һ2=18,3X9=30һ3=27,... >>

1X9=10һ1=9,2X9=20һ2=18,3X9=30һ3=27,...

3(xһ7)һ2(9һ3x)=18 3x-21-18+6x=18 9x-39=18 9x=39+18 9x=57 x=19/3

һ˻˾ԪϰһһԪӦ273ôȥӶأ2Ԫϰģ߼ռλ

һ30ϰ3ǣǾ27 2725=2

(3x+1)^2=9(2x+3)^2 (3x+1)²=[3(2x+3)]² 3x+1=3(2x+3)=6x+9 3x+1=6x+93x=-8x=-8/3 3x+1=-6x-99x=-10x=-10/9

ڵij˻1мǸżƽ 2N-1ƽX2N+1)ƽ+1=2Nƽ

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