Consider the following expression. limx → -3 √(2x+22)-4x+3 The value of the above expression (rounded to 2 decimal places) is …
Topic-wise GATE CS PYQs with verified steps
GATE CSE 2021 Set 1 · Q20
Time
Your answerNumerical answer
Solution
Official answer: 0.25 (±0)
CalculusEvaluating the limit directly by substituting gives an indeterminate form of :
Applying L'Hôpital's Rule, we differentiate the numerator and the denominator with respect to :
Substituting :
Thus, the value of the expression is 0.25.
Try the question first, then check your work.
Examiner trap
Notice that direct substitution results in the indeterminate form . Use L'Hôpital's Rule or rationalize the numerator.
This Calculus previous year question is Q20 of the GATE CSE 2021 Set 1 paper. Find more GATE CSE PYQs on Calculus in Engineering Mathematics, or browse all GATE CSE PYQs.
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Calculus has 40 GATE CSE PYQs across 25 papers from 2011 to 2026. 11 of them are 1-mark NAT questions like this one, and it is the only one in GATE CSE 2021 Set 1.
How GATE tests CalculusIndependent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.