Exercise · ZW-DEFINITE-INTEGRAL-006 · ★★☆ Intermediate
What is \(\int_0^2 3\,dx\)?
Choose one option.
Show answer
- D. 6
Explanation
The integrand is the constant 3 over an interval of length 2, so the area is 3·2 = 6.
Review the concept: Definite integral
The definite integral of \(f\) on \([a,b]\) is the limit of the Riemann sums as \(n\to\infty\). It represents the signed net area between the graph of \(f\) and the \(x\)-axis, from \(x=a\) to \(x=b\).
\[\int_a^b f(x)\,dx=\lim_{n\to\infty}\sum_{i=1}^{n}f(x_i^{*})\,\Delta x\]
More practice problems: definite integral
- ZW-DEFINITE-INTEGRAL-001 What is ∫_-1^1 x dx?
- ZW-DEFINITE-INTEGRAL-002 The definite integral ∫_a^b f(x) dx with f(x)≥ 0 represents...
- ZW-DEFINITE-INTEGRAL-003 What is the correct notation for the definite integral of f from a to b?
- ZW-DEFINITE-INTEGRAL-004 What is the definite integral built as a limit of Riemann sums called?
- ZW-DEFINITE-INTEGRAL-005 In Riemann sums, what does Delta x represent?
- ZW-DEFINITE-INTEGRAL-007 What is ∫_1^3 2x dx?
- ZW-DEFINITE-INTEGRAL-008 Is it true that if ∫_-1^1 f(x) dx=0 then f(x)=0 for all x∈[-1,1]?
- ZW-DEFINITE-INTEGRAL-009 Which property lets you split the integral of a sum of functions?