Question

determine the ap whose term3 is 5 & term7 is 9

Answer 1

Answer:

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The ap is 3,4,5.......

Answer 2

Answer

AP

tn = a + (n - 1 )d

t3 = 5 = a + ( 3 - 1 ) d

5= a + 2d .........................1

t7 = 9 = a + 6d

9 = a + 6d .......................2

subtract 1 from 2

a + 6 d= 9

a + 2d = 5  subtract

---------------

     4d = 4

       d = 1

a + 2d = 5

a = 5 - 2d

  = 5 - 2

  = 3

therefore  the AP is 3 , 4 , 5 .....................( answer )

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