HELP~~椭圆问题x2/a2+y2/b2=1.令x’=x/a,y’=y/b,怎么得到x’2+y’2= 1 ?这和椭圆参
1个回答
x’=x/a,y’=y/b,
所以x=ax’,y=by’
代入即可
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