The general term of a sequence is given by an =4n+15.Is the sequence forming is an AP ?? Is so , find its fifteen term .
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5
Answer:
yes this sequence is forming an A.P
Step-by-step explanation:
if we put values of n=1 ,2,3
a(1)= 19
a(2)=23
a(3)=27
a(3) - a(2) = a(2) - a(1) = 4(common difference)
so it is an A.P
it's 15th term
a(15)= 4×15 + 15
= 60+ 15
= 75.
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1
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