Find the sum of first term 22 of an Ap in which d=7 and 22 term is 149
Answers
Answered by
3
Answer:
1881
Step-by-step explanation:
please see the picture
Attachments:
Answered by
23
Answer:
here we have to find the first term(a)
t22=149
d=7
Step-by-step explanation:
hence t22=149
a+(n-1)d=149
a+(22-1)7=149
a+21*7=149
a=149-147
a=2
as we know Sn=n/2[2a+(n-1)d]
•S22=22/2[2(2)+21×7]
=11×4+147
=11×151=
=1661
Similar questions