1.

An=10_3n proves it is an A.p.

Answer»

Hi☺️

=> To prove : an = 10 - 3N is an A.P.

⏬⏬

a(n-1) = 10 - 3(n-1)

= 10 - 3n + 3

= 13 - 3n

an - a(n-1)

= 10 - 3n - 10 + 3n - 3

= -3

Hence it is an A.P.

Hope it helps you out✌️

Be BRAINLY ^_^

✴️GOOD NIGHT✴️



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