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Arithmetic Progressions — MATHS STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceMATHSArithmetic Progressions3 Marks
Question
Find the A.M. between:
7 and 13
✓

Answer

7 and 13
Let A be the arithem atic mean of 7 and 13
Then,
7, A, 13 are in A.P
$\Rightarrow\text{A}-7=13-\text{A}$
$\Rightarrow\text{A}=\frac{13-7}{2}=10$
$\therefore\text{A.M is 10}$

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