Question

The sum of first three terms is an ap is 24 and the sum of their squares is 224.Find the first three terms of an ap

Answer 1

ANSWER::

IN THIS TYPE OF QUESTIONS WE JUST DON'T NEED THE SUM OF THEIR SQUARES OR CUBES.. WE NEED ONLY THE SUM OF FIRST THREE TERMS,,,,,,AND ALSO WHEN WE HAVE TO LET THE FIRST THREE TERMS OF AN A.P WE JUST LET: a+1,a-1,a..

so, here is your original answer::

as written above, let the first three terms of an AP are A+1,A-1,A.

A.T.Q,

a+1+a-1+a=24,

3a=24,

a=8

hence first no. will be, 8+1=9

so, second no. will be, 8-1=7

and the third no. will be, 8

so, the first three terms of the A.P are 7,8,9..

just hope that this will help you,

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