How many terms are there in the ap 17 13 151 ?
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Answer:
Given that: a=7,d=T
2
−T=1=13−7=6
Let the number of terms be n. So T
n =151
T =a+(n−1)d
151=7+(n−1)6=7+6n−6
151=1+6n
∴150=6n
n= 6
150=25
∴n=25
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