यदि (2a-5, a+4, 4a-7) अंकगणितीय श्रेणी में हैं, तो (a) का मान क्या होगा?

If (2a-5, a+4, 4a-7) are in an arithmetic progression, what will be the value of (a)?

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Correct Answer

B. (3)

Step 1

Concept

From (2(a+4)=(2a-5)+(4a-7)), (2a+8=6a-12), so (a=5). Identify the middle term and form the equation.

Step 2

Why this answer is correct

The correct answer is B. (3). From (2(a+4)=(2a-5)+(4a-7)), (2a+8=6a-12), so (a=5). Identify the middle term and form the equation.

Step 3

Exam Tip

(2(a+4)=(2a-5)+(4a-7)) से (2a+8=6a-12), इसलिए (a=5)। मध्य पद को पहचानकर समीकरण बनाएं।

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Mathematics Answer, Explanation and Revision Hints

यदि (2a-5, a+4, 4a-7) अंकगणितीय श्रेणी में हैं, तो (a) का मान क्या होगा? / If (2a-5, a+4, 4a-7) are in an arithmetic progression, what will be the value of (a)?

Correct Answer: B. (3). Explanation: (2(a+4)=(2a-5)+(4a-7)) से (2a+8=6a-12), इसलिए (a=5)। मध्य पद को पहचानकर समीकरण बनाएं। / From (2(a+4)=(2a-5)+(4a-7)), (2a+8=6a-12), so (a=5). Identify the middle term and form the equation.

Which concept should I revise for this Mathematics MCQ?

From (2(a+4)=(2a-5)+(4a-7)), (2a+8=6a-12), so (a=5). Identify the middle term and form the equation.

What exam hint can help solve this Mathematics question?

(2(a+4)=(2a-5)+(4a-7)) से (2a+8=6a-12), इसलिए (a=5)। मध्य पद को पहचानकर समीकरण बनाएं।