Question

The output of int(x^2,1,3) and quad(‘x. ^2,1,3) is ________

(a) Same

(b) Different

(c) Maybe different

(d) Error

The question was asked by my school principal while I was bunking the class.

I'm obligated to ask this question of Integration topic in section Beyond the Basics of MATLAB

Answer 1

Right option is (b) Different

Explanation: The output for int(x^2,1,3) will be 26/3. The output for quad(‘x. ^2’,1,3) is 8.6667. Hence we find that each output will be different. The int command will return a fractional form while the quad command will return a decimal form up to 4 places of decimal, rounded up to the 4^th decimal place.

Output:

For int(x^2,1,3): 26/3

For quad(‘x. ^2’,1,3) : 8.6667