Solve for S_4
S_{4}=2700
Assign S_4
S_{4}≔2700
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S_{4}=2\left(750+600\right)
Divide 4 by 2 to get 2.
S_{4}=2\times 1350
Add 750 and 600 to get 1350.
S_{4}=2700
Multiply 2 and 1350 to get 2700.
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