The sum of first 7 terms of an AP is 63 and the sum of its next 7 terms is 161. Find the 28th term of this AP

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Alexandra · Answer

Answer:   uyfcihdddiydydofusxugcjgGdoy

Arya · Answer

Answer:   57   Step-by-step explanation:   S7=63  S14=63+161 =224  63=7/2[2a+6d]  2a+6d=18  224=14/2[2a+13d]  2a+13d=32  2a+6d=18  2a+13d=32  by solving, d=2 and a= 3  a28=a+27d        =3+27(2)        =3 + 54        =57

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