1.Let SnS_nSn denote the sum of the first nnn terms of an arithmetic progression. If S10=530S_{10} = 530S10=530 and S5=140S_5 = 140S5=140, then S20−S6S_{20} - S_6S20−S6 is equal to:a.186218621862b.184218421842c.185218521852d.187218721872Login to continueOnly logged in users canattempt or see the solution.
