若【-3(x+y)的m次方*(x-y)的2n次方】的2次方*【-(x+y)的2次方】=-9(x- 5
若【-3(x+y)的m次方*(x-y)的2n次方】的2次方*【-(x+y)的2次方】=-9(x-y)的10次方*(x-y)的12-n次方,求m,n的值...
若【-3(x+y)的m次方*(x-y)的2n次方】的2次方*【-(x+y)的2次方】=-9(x-y)的10次方*(x-y)的12-n次方,求m,n的值
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若【-3(x+y)的m次方*(x-y)的2n次方】的2次方*【-(x+y)的2次方】=-9(x+y)的10次方*(x-y)的12-n次方,求m,n的值
[-3(x+y)的m次方*(x-y)的2n次方]²*【-(x+y)²】=-9(x+y)¹º*(x-y)的12-n次方
9(x+y)的2m次方*(x-y)的4n次方*【-(x+y)²】=-9(x+y)¹º*(x-y)的12-n次方
-9(x+y)的2m+2次方*(x-y)的4n次方=-9(x-y)¹º*(x-y)的12-n次方
∴
2m+2=10
4n=12-n
∴
m=4
n=2.4
题目好像还错了
[-3(x+y)的m次方*(x-y)的2n次方]²*【-(x+y)²】=-9(x+y)¹º*(x-y)的12-n次方
9(x+y)的2m次方*(x-y)的4n次方*【-(x+y)²】=-9(x+y)¹º*(x-y)的12-n次方
-9(x+y)的2m+2次方*(x-y)的4n次方=-9(x-y)¹º*(x-y)的12-n次方
∴
2m+2=10
4n=12-n
∴
m=4
n=2.4
题目好像还错了
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