Question

then show that
3x + 3x
-4. If the function f :R-R defined by f (x) =
2
f (x + y) + f (x - y) = 2f (x) f (y).​

Answer 1

Step-by-step explanation:

nth term of an A.P (an) = pn + q

To find: Common Difference (d)

Proof: We know that,

an = a + (n – 1)d

⇒ pn + q = a + (n – 1)d [given]

⇒ pn + q – a = (n – 1)d