if S1 = a2+a4+a6 upto 100 terms and S2=a1+a3+a5+ upto 100 terms of a certain AP - Maths - Arithmetic Progressions

Question

if S1 = a2+a4+a6 upto 100 terms and S2=a1+a3+a5+ upto 100 terms of
a certain AP then prove that common difference of this AP is
(S1-S2)/100

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if S1 = a2+a4+a6 upto 100 terms and S2=a1+a3+a5+.....upto 100 terms of a certain AP then prove that common difference of this AP is (S1-S2)/100