Question

Sum of first 10 terms of an ap is 400 and sum of first 5 terms is 150 find its third term find its common difference find its first term​

Answer 1

Answer:

Common Difference = 4

First Term = 22

Third Terms = 30

Step-by-step explanation:

Sum of n terms of A.P =

$S_{n} = \frac{n}{2}(2a+(n-1)d)$

400 = 5(2a+9d)

150= 5/2 (2a+4d)

2a+9d= 80

2a+4d= 60

Therefore Common Difference = 4

First Term = 22

Third Terms = 30

Answer 2

Answer:

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