Question

Evaluate \[\int_{1}^{3}(2x+1)\,dx\].

Options

• \[10\]

• \[2\]

• \[12\]

• \[8\]

Answer 1

Using \[x^2+x\], the value is \[\left[x^2+x\right]_{1}^{3}\]. Therefore, \[(9+3)-(1+1)=10\].