The sum of first six terms of an AP is 42 .The ratio of its 10th term to 30th term is 1:3 .Calculate the 1st term and 13th term of the AP.
Answers
Answered by
0
Step-by-step explanation:
ANSWER
S
6
=42
7
30
7
10
=
3
1
42=
2
6
[2a+5d]⇒2a+5d=14
a+29d
a+9d
=
3
1
⇒3a+27d=a+29d
⇒2a=2d
⇒a=d
2a+5d =14
⇒2d+5d=14⇒d=a=2
7
1
=a=2
7
13
=a+12d=2+24=26
Hope it helps you
Mark me brainlist please
Attachments:
Similar questions