1.

The sum of n terms of an A.P is 3n2+5n.Find the A.P hence find its 15th term

Answer» Ok guys sry my fault
?????
U r wrong simian. ....find once again
Ap is 8 , 14 ,20 , 26....... and 15th term =92
AP is 11 ,22, 33...
Ap= 8,14,20.......and 15 the term =92
92


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