in an AP 3rd &7nth terms are 5.7 respectively find AP.
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Answered by
1
Answer:
a3= 5
a7 = 7
a+2d = 5
a+6d = 7
-4d = -2
d = 1/2
a+2(1/2) =5
a+1 = 5
a = 4
Answered by
1
an=. a+(n-1)d
5=a + 2d. -------1
7= a +6d. -------2
eq 2- eq 1
4d=2
d=1/2. -------3
from eq 1 and 3
a = 5 -2d = 5 - 1
a = 4
AP= 4,4.5,5,5.5
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