Find a1 + a6 + a11+ a16 if it is known that a1, a2 .... is in A.P. and a1 + a4 + a7 + ... + a16 = 147 Share with your friends Share 1 Anuradha Sharma answered this Dear Student, We know that in AP the sum of first and last term is equal to second and second last term and so soa1+a4+a7+a10+a13+a16= 147 a1+a16+ a4+a13+ a7+a10=147 a1+a16= a4+a13= a7+a10=147 3= 49So asked values, a1+a16+a11+a6= a1+a16+a11+a6=2 a1+a16= 2×49= 98Regards 6 View Full Answer
