Question

if the nth term of an A.P is (2n+1), then the sum of first three terms is:
a) 6n + 3
b) 15
c) 12
d) 21​

Answer 1

Answer:

option b is right it was east

Answer 2

Answer:

heyy mate first of all the answer is 15

Step-by-step explanation:

If the ninth term of AP is=(2n+1)

Then the first term of AP =2(1)+1

:- 2+1

:- 3

then the second term will =4(1) +1

:- 4+1

:- 5

in the same manner third term will be=2(3)+1

:-6+2

:- 7

so the sum of term will be 3+5+7

=15

Hope it will help you!!!!!!