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If \(n\) is a positive integer, the sum of the integers from \(1\) to \(n,\) inclusive, equals \(\dfrac{n(n+1)}2.\) Which of the following equals the sum of the integers from \(1\) to \(2n,\) inclusive?
A. \(n(n+1)\)
B. \(\dfrac{n(2n+1)}2\)
C. \(n(2n+1)\)
D. \(2n(n+1)\)
E. \(2n(2n+1)\)
Answer: C
Source: GMAT Paper Tests
A. \(n(n+1)\)
B. \(\dfrac{n(2n+1)}2\)
C. \(n(2n+1)\)
D. \(2n(n+1)\)
E. \(2n(2n+1)\)
Answer: C
Source: GMAT Paper Tests
