Maths / Arithmetic Progression / First Term and Common Difference of an AP

QUESTION

What is the common difference of the following AP?

$\dpi{120} \fn_jvn \large \sqrt {361}, \sqrt {441},\sqrt{529}, .......$

EXPLANATION
Explain TypeExplanation Content
Text

$\dpi{120} \fn_jvn \large \sqrt {361}, \sqrt {441},\sqrt{529}, .......$

$\dpi{120} \fn_jvn \large 19,21,23,.....$

$\dpi{120} \fn_jvn \large d_1=a_2-a_1= 21-19= 2$

$\dpi{120} \fn_jvn \large d_2=a_3-a_2= 23-21= 2$

$\dpi{120} \fn_jvn \large d_2=d_1$

So the common difference= 2

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