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FIND THE 7TH ELEMENT

IF THE INITIAL VALUE OF A SEQUENCE IS 6 AND THE COMMON DIFFERENCE IS 6, WHAT IS THE 7TH ELEMENT?

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1 Answer

Using the formula where ais the initial value and ais the 'nth' term, while 'd' is the common difference:

 

a= a+ (n-1) x d = 6 + (7-1) * x 6 = 6 + 36 = 42

 

QED