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Question
How many terms are there in the AP: -10, -5, 0, ...50?
How many terms are there in the AP: -10, -5, 0, ...50?
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Solution
The correct option is B 13
For the given AP,
First term, a = -10.
Common difference, d = -5 - (-10) = 5.
The last term of the AP is given to be 50.
The general term of an AP = a + (n - 1)d
50 = -10 + (n - 1)5
60 = 5n - 5
n = 13.
Therefore, there are 13 terms in the AP.
For the given AP,
First term, a = -10.
Common difference, d = -5 - (-10) = 5.
The last term of the AP is given to be 50.
The general term of an AP = a + (n - 1)d
50 = -10 + (n - 1)5
60 = 5n - 5
n = 13.
Therefore, there are 13 terms in the AP.
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