The points \[(at_{1}^{2},2a{{t}_{1}}),(at_{2}^{2},2a{{t}_{2}})\]and \[(a,0)\]will be collinear, if

The points \[(at_{1}^{2},2a{{t}_{1}}),(at_{2}^{2},2a{{t}_{2}})\]and \[

1.	The points \[(at_{1}^{2},2a{{t}_{1}}),(at_{2}^{2},2a{{t}_{2}})\]and \[(a,0)\]will be collinear, if
A.	\[{{t}_{1}}{{t}_{2}}=1\]
B.	\[{{t}_{1}}{{t}_{2}}=-1\]
C.	\[{{t}_{1}}+{{t}_{2}}=1\]
D.	\[{{t}_{1}}+{{t}_{2}}=-1\]
Answer» C. \[{{t}_{1}}+{{t}_{2}}=1\]

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The points \[(at_{1}^{2},2a{{t}_{1}}),(at_{2}^{2},2a{{t}_{2}})\]and \[(a,0)\]will be collinear, if

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