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If the common difference of an A.P is d, find a3 – a1
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If the common difference of an A.P is d, find a3 – a1

User Starasia
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1 Answer

3 votes

Answer:

2d

Explanation:

The n th term of an AP is


a_(n) = a₁ + (n - 1)d

where a₁ is the first term and d the common difference, thus

a₃ - a₁

= a₁ + 2d - a₁

= 2d

User Yeodave
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