If nth term of an AP is 2n + 1 what is the sum of its first three term
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Answered by
0
Answer:
a1=2(1)+1
=3
a3+2(3)+1
+7
a2=2(2)+1
=5
s3=3/2(3+7)
=15
Step-by-step explanation:
sahilagale111:
It is given that "n" term= 2n+1
yeah so nth term can be any 1,2,3,etc
so if you want 1st term put 1 in place of n
Answered by
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let first term be
2*1+1=3
second term be
2*2+1=5
third term be
2*3+1=7
sum of first three terms = 3+5+7
=15
It's given that "n" term = 2n + 1
yes
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