Let S be the focus of the hyperbola x216-y29=1 lying on the positive X- axis and P5,y1 be point on the hyperbola. Then SP=

TS EAMCET · Maths · Hyperbola

Let $S$ be the focus of the hyperbola $\frac{x^{2}}{16} - \frac{y^{2}}{9} = 1$ lying on the positive $X -$ axis and $P (5, y_{1})$ be point on the hyperbola. Then $SP =$

A $\frac{1}{4}$
B $\frac{3}{4}$
C $\frac{9}{4}$
D $\frac{5}{4}$

Verified Solution

Answer & Solution

Correct Answer

(C) $\frac{9}{4}$

Step-by-step Solution

Detailed explanation

Since, point P5,y1 lies on the hyperbola x216-y29=1, therefore 5216-y129=1 ⇒y129=2516-1 ⇒y12=8116 ⇒y1=±94 So, P≡5,±94. Now, eccentricity of hyperbola is e=1+916=54 Therefore, S≡5,0 Hence, SP=5-52+0-942=94

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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