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The first term of an AP is 5, common difference is 3 and the last term is 80. Find the number of terms.

The first term of an AP is 5, common difference is 3 and the last term is 80. Find the number of terms.
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The first term of an AP is 5, common difference is 3 and the last term is 80. Find the number of terms.

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User JonathanTien
by
8.5k points

1 Answer

6 votes

Answer:

n=26

Explanation:

an=a+(n-1)d

80=5+(n-1)3

80=5+3n-3

80-2=3n

78/3=n

n=26

answered
User MrMythical
by
8.2k points
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