If x=2 is a solution of the epuation1/9{1/6[1/3(x+a/2+4)−7]+10}=1,then a=_. (英汉词典:solution解;epuation方程)
问题描述:
If x=2 is a solution of the epuation
{1 9
[1 6
(1 3
+4)−7]+10}=1,then a=______.x+a 2
(英汉词典:solution解;epuation方程)
答
根据题意得:
{1 9
[1 6
(1 3
+4)-7]+10}=1,2+a 2
即
[1 6
(1 3
+4)-7]+10=9,2+a 2
[1 6
(1 3
+4)-7]=-1,2+a 2
(1 3
+4)-7=-6,2+a 2
(1 3
+4)=1,2+a 2
+4=3,2+a 2
=-1,2+a 2
∴a=-4.
故答案为:-4.