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For f(x) = 2x + 3 at x = 1, the limit and f(1) are both:
A2
B7
C5
D3
Answer & Solution
Correct answer: C. 5
1. Substituting x = 1 gives 2 times 1 plus 3.
2. The limit as x tends to 1 gives the same.
3. Both come out as 5, so f is continuous there.
4. The answer is 5.
_Source: NCERT Class 12 Mathematics, Ch 5 'Continuity and Differentiability'_
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