Question

Please help me with the following definite integral (click to see).

Answer 1

\[\int\limits_{1}^{3}(x+1)dx\]

Answer 2

My answer is equal to 9 but if you solve this geometrically the answer is 6...where am I going wrong?

Answer 3

x^2/2 + x ----> 9/2+3-1/2-1 = 4+3-1 = 6

Answer 4

how u got 9 ??

Answer 5

\[(\frac{ 9 }{ 2 }+3)+(\frac{ 1 }{ 2 }+1)\]

Answer 6

lower limit is subtracted....

Answer 7

oh thanks

Answer 8

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