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## Homework Statement

theoretically, bending moment should ends at bending moment = 0 , am i right ?

## Homework Equations

## The Attempt at a Solution

Here's my sketch of SFD and BMD ,my bending moment doesnt return to 0 , which part of my working is wrong ... to find bending moment (M) , i get M =Vdx , where V =shear force

Vdx = area of the shear force diagram

for the BMD , I let downwrads as positive ....