$\int_1^3 x\,dx$ equals:
A2
B4
C5
D9
Answer & Solution
Correct answer: B. 4
$\int_1^3 x\,dx = [x^2/2]_1^3 = 9/2 - 1/2 = 8/2 = 4$.
Related questions
Using definite integration as the limit of a sum, $\int_1^2 (2x + 5)\,dx$ equals:$\int_0^{\pi/2} \cos^2 x\,dx$ equals:$\int_0^{\pi/2} qrt{1 - \cos 4x}\,dx$ equals:Using the King's property, evaluate $\int_0^{\pi/2} \dfrac{dx}{1 + qrt[3]{\tan x}}$:$\int_1^2 \dfrac{\log x}{x^2}\,dx$ equals:$\int_{-1}^{1} |5x - 3|\,dx$ equals:Evaluate $\int_2^3 7^x\,dx$:$\int_0^4 (x - x^2)\,dx$ equals: