1.Let a1,a2,a3,…a_1, a_2, a_3, \dotsa1,a2,a3,… be in an A.P. such that a1+a2+⋯+ak−1ak+1+ak+2+⋯+a2k−1=121\frac{a_1 + a_2 + \dots + a_{k-1}}{a_{k+1} + a_{k+2} + \dots + a_{2k-1}} = \frac{12}{1}ak+1+ak+2+⋯+a2k−1a1+a2+⋯+ak−1=112 and a1≠0a_1 \neq 0a1=0. If a1+a2+⋯+ak=0a_1 + a_2 + \dots + a_k = 0a1+a2+⋯+ak=0, then kkk is:a.111111b.101010c.181818d.171717Login to continueOnly logged in users canattempt or see the solution.
