Solve the problem.Use the sequence of equations to find a general rule. 1 = 0 + 1 1 + 3 + 1 = 1 + 4 1 + 3 + 5 + 3 + 1 = 4 + 9 . . . . . . . . . . . . . . .Fill in the blank to complete the equation: 1 + 3 + 5 + . . . (2n + 1) + . . . + 5 + 3 + 1 = ?
A. n2 + (n + 1)2
B. (n - 1)2 + (n + 1)2
C. 
2 + 
2
D. n2 + (n - 1)2
Answer: A
Mathematics
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A. 6 B. 7 C. -8 D. -7
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