Question

write down in terms of n, expression for the nth term : 12,10,8,6,4

Answer 1

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☆ Given:-

• First term (a) = 12.

• Second term (a2) = 10.

• Third term (a3) = 8.

• Fourth term (a4) = 6.

• Fifth tern (a5) = 4.

☆ Now,

Common Difference (d),

= a2 - a1

= 10 - 12

= -2.

☆ Therefore,

nth term (an)

= a + (n-1)d.

= 12 + (n-1)(-2)

= 12 + (-2n) + 2

= 12 - 2n + 2

${\large{\blue{\boxed{=\:\:14-2n}}}}$

Therefore your answer is 14-2n.

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