Maths-

General

Easy

Question

# The line y = 2x + c touches the ellipse if c is equal to

- 0
- ± 2
- c = ±
- c = ± .

Hint:

### If the line y = mx + c touches the ellipse , then .

## The correct answer is: ± 2

### If, The line y = 2x + c touches the ellipse if c is equal to

comparing with standard form

Substituting these values in , we get

Thus, The line y = 2x + c touches the ellipse if c is equal to

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