一张百元多少克:2a/5a^2b+3b/10ab^2=?
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1、3/(x-1)^2-3x/(x-1)^2=?
2、2a/5a^2b+3b/10ab^2
3、2m/5n^2p-3n/4mp^2
2、2a/5a^2b+3b/10ab^2
3、2m/5n^2p-3n/4mp^2
1、3-3x/(x-1)^2
2、7/(10ab)
3、(8m^2p^2n^2-15n^2^3)/(20n'2mp'2)
a▲b=a/b-b/a,[2▲(5▲3)]=?
a^2+b^2/a+b
a*a+3b*b≥2b(a+b)
化简:(2a-b-c)/(a-b)(a-c)+(2b-c-a)/(b-c)(b-a)+(2c-a-b)/(c-a)(c-b)
化简:b/(a+b) + b/(a -b) +(a^2+b^2)/(a^2 -b^2)
求证:|a^2-b^2|/|a|≥|a|-|b|
b/(a+b)=(a+c+-b)/(b+c-a)=(a+b+c)/(2a+b+2c)求a:b:c=
2a-b-c/(a-b)(a-c)+ab -c-a/(b-c)(b-a)+2c-a-b/(c-a)(c-b)
【若实数a,b分别满足a^2-5a+2=0,b^2-5b+2=0,则b/a+a/b+_________】
已知实数a,b满足a^2+3a-1=0,b^2+3b-1=0,求b/a+a/ b