If (a_n=95-5n), what will be the (26)th term?
Advertisement
Answer and explanation
Correct answer: -35
Given \(a_n=95-5n\), substitute \(n=26\): \(a_{26}=95-5\times26=95-130=-35\). Hence, option A is correct. \(-30\) would result from an error in multiplication or subtraction. Exam tip: after substituting \(n\), multiply first and then subtract.
Frequently asked questions
What is the correct answer to this question?
-35
Why is this the correct answer?
Given \(a_n=95-5n\), substitute \(n=26\): \(a_{26}=95-5\times26=95-130=-35\). Hence, option A is correct. \(-30\) would result from an error in multiplication or subtraction. Exam tip: after substituting \(n\), multiply first and then subtract.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Arithmetic Progressions (AP). Topic: Finding the $n$th term of an AP.
Advertisement