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If Sn the sum of first n terms of an AP ...

If `S_n` the sum of first n terms of an AP is given by `2n^2+n`, then find its nth term.

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X BOARD PREVIOUS YEAR PAPER ENGLISH-X Boards-All Questions
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  3. If Sn the sum of first n terms of an AP is given by 2n^2+n, then find ...

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  4. If in an AP a=15, d=-3 and an=0. Then find the value of n.

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  7. For what value of P, points (2,1),(P, -1) and (-1,3) are collinear

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  9. In a triangle ABC, B=90^@ and D is the mid-oint of BC then prove that ...

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  10. If sinx+cosy=1 , x=30^0 and y is an acute angle. Find the value of y

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  13. A train travels 360 km at a uniform speed. If the speed had been 5k...

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  14. In figure, three sectors of a circle of radius 7 cm, making angles of ...

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