1.

Find the 8th term of the A.P., 117, 104, 91, 78, ………………

Answer»

In the given A.P., a1 = 117, a2 = 104 

Common difference d = a2 – a1 

= 104 – 117 

= -13 

∴ 8th term t8 = a1 + 7d

= 117 + 7(-13) 

= 117 – 91 = 26



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