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In the sequence \(a_1, a_2, a_3,\ldots, a_n,\) \(a_n=a_{n-1}+1.\) If \(a_1=b\) then \((a_{10})^2-(a_7)^2\) is equal to which of the following?
A. \(3b\)
B. \(6b+45\)
C. \(6b+51\)
D. \(7b+45\)
E. \(7b+51\)
Answer: B
Source: Veritas Prep
A. \(3b\)
B. \(6b+45\)
C. \(6b+51\)
D. \(7b+45\)
E. \(7b+51\)
Answer: B
Source: Veritas Prep
