Q.2 Find the sum of the followingAP:
3, 7, 11.......... to 12 terms
Answers
Answered by
1
Answer:
Common difference = Second term − First term = 4 − 2 = 2 (2) 2, 52, 3, 73 ,. ... Question 2 : ... The given sequence is –12, –5, 2, 9, 16, 23, 30,. ... Find the 19th term of the following A.P. 7 .
Answered by
0
a=3 d=4 n=12
an=a+(n‐1)d
3+(12‐1)4
3+11×4
3+44
47
Sn=n/2(2a+(n‐1)d)
=12/2(2×3+(12‐1)4)
=6(6+11×4)
=6(6+44)
=6(50)
=350
answer is 350
Similar questions