# Variable limits of intergration

Printable View

• November 9th 2008, 09:15 AM
elitespart
Variable limits of intergration[resolved]
okay I know that d/dxhttp://www.mathgoodies.com/forums/im...h_integral.giff(t)dt from a to x is f(x) but what happens if x is the lower limit instead of the upper limit? So from x to a. Does it become negative? Thanks.
• November 9th 2008, 09:25 AM
Krizalid
Yes by simple property $\int_{a}^{b}{f}=-\int_{b}^{a}{f}.$
• November 9th 2008, 09:27 AM
elitespart
cool. thanks.