'当a = 8且b = 9时,L作为a和b的平方根共同变化,L = 72.当a = 1/2且b = 36时,找到L? Y作为x的立方和w的平方根共同变化,当x = 2且w = 16时,Y = 128.当x = 1/2且w = 64时,找到Y?

'当a = 8且b = 9时,L作为a和b的平方根共同变化,L = 72.当a = 1/2且b = 36时,找到L? Y作为x的立方和w的平方根共同变化,当x = 2且w = 16时,Y = 128.当x = 1/2且w = 64时,找到Y?
Anonim

回答:

#L = 9“和”y = 4#

说明:

#“最初的陈述是”Lpropasqrtb#

#“转换为等式乘以k常数”#

#“变异”#

#rArrL = kasqrtb#

#“找到k使用给定的条件”#

当“a = 8”和“b = 9#”时,#L = 72“

#L = kasqrtbrArrk = L /(asqrtb)= 72 /(8xxsqrt9)= 72/24 = 3#

#“方程式”是颜色(红色)(条形(ul(|颜色(白色)(2/2)颜色(黑色)(L = 3asqrtb)颜色(白色)(2/2)|)))#

#“当”a = 1/2“和”b = 36“#

#L = 3xx1 / 2xxsqrt36 = 3xx1 / 2xx6 = 9#

#COLOR(蓝色)“-------------------------------------------- -----------“#

# “同样” #

#Y = KX ^ 3sqrtw#

当“x = 2”和“w = 16#时,#y = 128”

#K = Y /(X ^ 3sqrtw)= 128 /(8xx4)= 128/32 = 4#

#“方程式”是颜色(红色)(条形(ul(|颜色(白色)(2/2)颜色(黑色)(y = 4x ^ 3sqrtw)颜色(白色)(2/2)|)))#

#“when”x = 1/2“和”w = 64#

#Y = 4XX(1/2)^ 3xxsqrt64 = 4xx1 / 8xx8 = 4#