In an A.P. , if common difference d=6, then a5-a11 is equal to
(a) 6
(b) 36
(c) - 6
(d) -36
Answers
Answered by
1
Answer:
Common difference, d = -6
we know that, a
n
=a+(n−1)d
a−5=a+(5−1)−6
a
5
=a+(4)−6
a
5
=a−24 ........ (1)
a
7
=a+(7−1)−6
a
7
=a+(7−−1)−6
=a+(6)−6
a
7
=a−36 ........ (2)
Subtracting equation (1) & (2) we get
a
5
−a
7
=12
Answered by
2
Step-by-step explanation:
option option b is the correct answer
36।
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