how to solve this question properly
Attachments:
NeelamG:
use formula an= a+(n-1)d
where n is the number of terms
d is common difference
a is first term
Answers
Answered by
3
Let the first term be A and common difference be d.
We know that
An = A + (n - 1)d , where n = the term.
It is said about 4th term so,
A4 = A + (4-1)d
11 = A + 3d ------(1)
Similarly, 5th term,
A + (5-1)d = A + 4d
and 7th term is A + (7-1)d = A + 6d
A/Q -->
A + 4d + A + 6d = 34
2A + 10d = 34
A + 5d = 17. ------(2)
Solving (1) and (2) we get,
2d = 6
d = 3
Hope This Helps You!
We know that
An = A + (n - 1)d , where n = the term.
It is said about 4th term so,
A4 = A + (4-1)d
11 = A + 3d ------(1)
Similarly, 5th term,
A + (5-1)d = A + 4d
and 7th term is A + (7-1)d = A + 6d
A/Q -->
A + 4d + A + 6d = 34
2A + 10d = 34
A + 5d = 17. ------(2)
Solving (1) and (2) we get,
2d = 6
d = 3
Hope This Helps You!
Similar questions