किसी A.P. का 7वाँ पद 20 और 13वाँ पद 32 है। A.P. ज्ञात कीजिए।
Answers
Answered by
1
a7=20
a+6d=20→1st eq^n
a13=32
a+12d=32→2nd eq^n
Subtracting 1st and 2nd eq^ns
a+6d-a-12d=20-32
-6d=-12
d=-12/-6
d=2
put d=2 in 1st eq^n
a+6(2)=20
a+12=20
a=8
So, AP is 8,14,20,26,32,38…
Mark this as brainleast, plz...
For more follow me...
Answered by
0
Answer:
7वाॅ पद=20
a+(7-1)d=20
a+6d=20............(1)
13वाॅ पद=32
a+(13-1)d=32
a+12d=32 ...........(2)
On solving (1)&(2) ,we obtain
a=8 ,d=2
Hence A.p series a,a+d,a+2d,a+3d,.........to n term
8,10,12,14,16,........nterm
Similar questions