a*a+b*b=c*c

2007-12-16 2:01 am
a*a+b*b=c*c
If a =99,
b=?
c=?
更新1:

b+1=c!!!!!!!!!!!!!!!!!!!

回答 (3)

2007-12-25 6:31 am
✔ 最佳答案
a*a+b*b=c*c
a^2+b^2=c^2

If a=99 and b+1=c,

a^2+b^2=c^2
    b^2=c^2-a^2
    b^2=(b+1)^2-a^2
    b^2=(b+1+a)(b+1-a)
    b^2=(b+100)(b-98)
    b^2=b^2+2b-9800
     2b=9800
      b=4900

When b=4900,
c=4900+1
 =4901

Therefore, b=4900 and c=4901.

2007-12-24 22:47:46 補充:
To 長島龍子:The questioner has updated the question that 'b 1=c'.
參考: Myself~
2007-12-17 7:09 pm
Can't be calculate.
2007-12-16 2:43 am
a*a=c*c-b*b=(c+b)(c-b)=99*99=9801=121*81
c+b=121, c-b=81,
b = 20,
c= 101


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