Question

Evaluate the integral using the definition:

Answer 1

http://prntscr.com/3d308o

Answer 2

so u dint get it ?

Answer 3

\(\large\int_{-1}^{-3}(1+4x) dx=\sum_{i=1}^{n}f(x_i) \Delta x\)
\(\large f(x_i)=(1+4x_i)\)
\(\large f(x_i)=[1+4(-1+i\Delta x)]\)
\(\large\int_{-1}^{-3}(1+4x) dx=\sum_{i=1}^{n}[1+4(-1+i\Delta x)]\Delta x\)

Answer 4

i made a typo ( i dint write limit n-->infinite sry )
so when u find the sumation , just find the limit :O
wanna me to continue ?

Answer 5

Yes please >.<