The common difference of an $A.P.$ when first term is $a - 3 d$ and seventh term is $a + 3 d$ ,
is

d

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2 d

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3 d

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Solution

The correct option is A $d$
Seven terms selected in $A.P.$ are given as $a - 3 d, a - 2 d, a - d, a, a + d, a + 2 d, a + 3 d$

So, the common difference of the terms is $d .$

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The common difference of an A.P. when first term is a−3d and seventh term is a+3d, is

The correct option is A dSeven terms selected in A.P. are given as a−3d,a−2d,a−d,a,a+d,a+2d,a+3d So, the common difference of the terms is d.

The common difference of an $A.P.$ when first term is $a - 3 d$ and seventh term is $a + 3 d$ ,
is

The correct option is A $d$
Seven terms selected in $A.P.$ are given as $a - 3 d, a - 2 d, a - d, a, a + d, a + 2 d, a + 3 d$

So, the common difference of the terms is $d .$