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ap-negative-difference-expert MCQ Questions for Class 10

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Question 1/1 Expert Mathematics Arithmetic Progressions (AP) Finding the $n$th term of an AP Class 10 Level 64

एक समान्तर श्रेणी में \(a_{10}=25\) और \(a_{30}=-135\) है। \(a_{55}\) क्या होगा?

In an AP, \(a_{10}=25\) and \(a_{30}=-135\). What is \(a_{55}\)?

Explanation opens after your attempt
Correct Answer

B. (-335)

Step 1

Concept

\(d=\frac{-135-25}{30-10}=-8\). (a_{55}=-135+25(-8)=-335).

Step 2

Why this answer is correct

The correct answer is B. (-335). \(d=\frac{-135-25}{30-10}=-8\). (a_{55}=-135+25(-8)=-335).

Step 3

Exam Tip

\(d=\frac{-135-25}{30-10}=-8\)। (a_{55}=-135+25(-8)=-335)।

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