A1 is the first area and N1 is its shape function then shape function

1.	A₁ is the first area and N₁ is its shape function then shape function N₁= ___
A.	A<sub>1</sub>/A
B.	A-A<sub>1</sub>
C.	A<sub>1</sub>+A
D.	A<sub>1</sub>
Answer» B. A-A<sub>1</sub>

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