{1+[1/16-(3/4)^4}/(7/3)^2等于几?{1+[1/16-(3/4)^4}/(7/3)^2怎么算.

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{1+[1/16-(3/4)^4}/(7/3)^2等于几?{1+[1/16-(3/4)^4}/(7/3)^2怎么算.{1+[1/16-(3/4)^4}/(7/3)^2等于几?{1+[1/16-(3/4

{1+[1/16-(3/4)^4}/(7/3)^2等于几?{1+[1/16-(3/4)^4}/(7/3)^2怎么算.
{1+[1/16-(3/4)^4}/(7/3)^2等于几?
{1+[1/16-(3/4)^4}/(7/3)^2怎么算.

{1+[1/16-(3/4)^4}/(7/3)^2等于几?{1+[1/16-(3/4)^4}/(7/3)^2怎么算.
原式={1+[（1/4)^2-(3/4)^4}/(7/3)^2={1+[1/4+(3/4)^2 }{[1/4-(3/4)^2 }/(7/3)^2=={1+（1/4+(3/4)^2 （1/4-(3/4)^2） }/(7/3)^2={1+（4/16+9/16）（4/16-9/16）}/(7/3)^2=（1-13/16*5/16）/(7/3)^2=256/16^2-65/16^2）/(7/3)^2=189/16^2/(7/3)^2=189/256*9/49