Progression (Sequence and Series)Hard

Question

Let the sequence a1, a2, a3, ......, an form an A.P., then a12 − a22 + a32 − a42 + ...... + a2n−12 − a2n2 is equal to -

Options

A.(a12 − a2n2)
B.(a2n2 − a12)
C.(a12 + a2n2)
D.None of these

Solution

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