Question

एक समांतर श्रेणी का तीसरा पद 5 और सातवां पद ९ हो तो वह समांतर श्रेणी ज्ञात करो pls Question full answer​

Answer 1

Step-by-step explanation:

d = (am - an)(m - n)

so d = (9-5)(7-3) = 1

now

an = a + (n-1)d

5 = a + 2×1

{3rd term of the ap}

a = 3

so the ap is

3, 4, 5, 6, 7, 8, ...

where a=3

d=1