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Question

The first four terms of an AP, whose first term is -2 and the common difference is -2, are


A

-2,0,2,4

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B

-2,4,-8,16

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C

-2,-4,-6,-8

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D

-2,-4,-8,-16

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Solution

The correct option is C

-2,-4,-6,-8


We know that the nth term of an AP is given by the formula an=a+(n1)d

where a= first term; an= the nth term; d=the common difference

a=2;d=2;a1=a=2a2=a+d=2+(-2)=4

Similarly,

a3=6a4=8

So, the required A.P is2,4,6,8,....

Hence, the correct option is C.


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