7. Find the difference between the 21" and the 10th terms of an AP if the common diference
is 6.
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10th
Maths
Arithmetic Progressions
General Formula for nth Term
In an A.P. if its first ter...
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In an A.P. if its first term is 10 and common difference is −6 then find its general term.
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a = 10
d = -6
a
n
=a+(n−1)d
a
n
=10+(n−1)×−6
=10−6n+6
=16−6n
∴ The general term is 16−6n
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