GATE 2026 Chemical Engineering, Q35 · Numerical Methods
The correct answer is 1.24 to 1.26.
Question
Using single step trapezoidal rule, the value of 16x dx is ______ (rounded off to two decimal places).
Official answer: 1.24 to 1.26
Why
GATE 2026 official key: 1.24 to 1.26. f(0)=1, f(0.5)=1+8−5=4. Single-interval trapezoidal rule: (0.5/2)(f(0)+f(0.5))
Explanation cross-checked for consistency. Final answer matches the official IIT answer key.