Question

if an ap first term is 2 then last term is 29 sum of terms o 155 find the number of terms
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Answer 1

Answer:

n = 10

Step-by-step explanation:

a=2. l=29

Sn =n/2 (a+l)

155=n/2 (2 + 29)

155x2= nx31

310 =31n

310/31=n

therefore.

n = 10