The first term of an AP is 'a' & the 2nd term is 'b'.find the common difference & 3rd term
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common difference is a term subtracted by its previous term
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shubhashree2580:
right answer
thank you
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here, a1 =a
a2=b
d = a2 - a1
= b - a
a3 = a + 2d
= a + 2×(b-a)
=a + 2b - 2a
= 2b - a
a2=b
d = a2 - a1
= b - a
a3 = a + 2d
= a + 2×(b-a)
=a + 2b - 2a
= 2b - a
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