If (a=2.5) and (d=1.5), what are the first three terms?
Answer and explanation
Correct answer: (2.5, 4.0, 5.5)
In an AP, the first term is a, and the common difference d is added to obtain each next term. Here the first three terms are 2.5, 2.5 + 1.5 = 4.0, and 4.0 + 1.5 = 5.5. Therefore, option A is correct. In option C, the first term is correct, but its common difference is 2.5, not 1.5. Exam tip: For the first three terms, use a, a + d, and a + 2d.
Frequently asked questions
What is the correct answer to this question?
(2.5, 4.0, 5.5)
Why is this the correct answer?
In an AP, the first term is a, and the common difference d is added to obtain each next term. Here the first three terms are 2.5, 2.5 + 1.5 = 4.0, and 4.0 + 1.5 = 5.5. Therefore, option A is correct. In option C, the first term is correct, but its common difference is 2.5, not 1.5. Exam tip: For the first three terms, use a, a + d, and a + 2d.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Arithmetic Progressions (AP). Topic: Introduction to APs and common difference..
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