两个数字的平均值是41.125,它们的乘积是1683.这些数字是多少?
这两个数字是38.25和44,数字是a和b。由于它们的平均值是(a + b)/ 2,我们有(a + b)/2=41.125或a + b = 41.125xx2 = 82.25或a = 82.25-b,即数字是(82.25-b)和b As数的乘积是1683,因此b(82.25-b)= 1683或82.25bb ^ 2 = 1683或329b-4b ^ 2 = 6732 - 将每个项乘以4即4b ^ 2-329b + 6732 = 0并使用二次方公式b =(329 + -sqrt(329 ^ 2-4xx4xx6732))/ 8 =(329 + -sqrt(108241-107712))/ 8 =(329 + -sqrt529)/ 8 =(329 + -23)/ 8即b = 352/8 = 44或b = 306/8 = 153/4 = 38.25 ans a = 82.25-44 = 38.25或a = 82.25-38.25 = 44因此这两个数字分别为38.25和44
两个数字的差异是18.如果较大的数字除以较小的数字,则商数变为2,余数为4.这些数字是多少?
14和32 x和x + 18 [x + 18] / x = 2余数4 => 2x + 4 = x + 18 x + 4 = 18 x = 14 14 + 18 = 32
两个数字的差异是3,它们的平方差是69.这些数字是多少?
颜色(红色)(10和13)或颜色(蓝色)( - 10和-13令x和y为两个数字。(x,yinZZ)两个数字的差值为3. ie。| xy | = 3 = > xy = + - 3 =>颜色(红色)(xy = 3 ...到(1)orcolor(蓝色)(xy = -3 ...到(2)它们的平方差是69.即x ^ 2-y ^ 2 = 69 =>(xy)(x + y)= 69,其中,颜色(红色)(xy = 3来自(1)或颜色(蓝色)(xy = -3来自(2)=> 3(x + y)= 69或-3(x + y)= 69 =>颜色(红色)(x + y = 23 ...至(3))或颜色(蓝色)(x + y = -23) ...到(4)添加颜色(红色)((1)和(3))或颜色(蓝色)((2)和(4))颜色(红色)(xy = 3)颜色(白色)(.. .............................颜色(蓝色)(xy = -3颜色(红色)(ul(x + y = 23 )颜色(白色)(.............................颜色(蓝色)(ul(x + y = -23)颜色(红色)(2x = 3 + 23 = 26)颜色(白色)(...................颜色(蓝色)(颜色(蓝色)(2x =( - 3)+( - 23)= - 26颜色(红色)(x = 26/2)颜色(白色)(............