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This my few questions if u know pls help me & thank you!

1) Find tn of the A.P 4,9,14,...

2) The 7™ term of an A.P. is 32 and 13™ term is 62.find the A.P

3) The sum of the three consecutive number in A.P is 21 and their product is 231.find the number.

4) The sum of the first 'n' terms of an A.P is 3n²+5n.find the A.P.,hence find its 16™ term.

5)Find the root of the quadratic equation x²-9=0.

6)Solve 4x²-16+15=0 by completing square method.

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by minal61

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