⑴Y=m/X过A(2,1),得m=2,
⑵N(2/(a-1),a-1 ),M(K/(a-1),a-1),
MT=K/(a-1),NT=2/(a-1),
由已知得:
K/(a-1)=2*2/(a-1),
K=4.
∵MN=[2/(a-1)]-[-4/(a-1)]=6/(a-1)
PN=(a+1)-2/((a-1)
根据三角形面积公式
MN•(a-1-1)/2=3PN•(a-1-1)/2
∴6/(a-1)(a-1-1)/2=3[(a+1)-2/((a-1)](a-1-1)/2
∴a=√5
⑴Y=m/X过A(2,1),得m=2,
⑵N(2/(a-1),a-1 ),M(K/(a-1),a-1),
MT=K/(a-1),NT=2/(a-1),
由已知得:
K/(a-1)=2*2/(a-1),
K=4.
∵MN=[2/(a-1)]-[-4/(a-1)]=6/(a-1)
PN=(a+1)-2/((a-1)
根据三角形面积公式
MN•(a-1-1)/2=3PN•(a-1-1)/2
∴6/(a-1)(a-1-1)/2=3[(a+1)-2/((a-1)](a-1-1)/2
∴a=√5