In an arithmetic progression, (d=4) and the second term is (11). What is the first term?
Answer and explanation
Correct answer: 7
In an arithmetic progression, the second term is obtained by adding the common difference to the first term: \(a_2=a_1+d\). Thus, \(11=a_1+4\), so \(a_1=7\). Option 11 is the second term, not the first term. Exam tip: subtract \(d\) from the second term to find the first term.
Frequently asked questions
What is the correct answer to this question?
7
Why is this the correct answer?
In an arithmetic progression, the second term is obtained by adding the common difference to the first term: \(a_2=a_1+d\). Thus, \(11=a_1+4\), so \(a_1=7\). Option 11 is the second term, not the first term. Exam tip: subtract \(d\) from the second term to find the first term.
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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