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Find the sum of 'n' terms of 1.2 +2.3+3....

Find the sum of 'n' terms of 1.2 +2.3+3.4+4.5+……

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Find the sum to 'n' terms of 1.2.3 +2.3.4+3.4.5+……

Find the sum of n terms of the series 1. 2. 3+2. 3. 4+3. 4. 5+

Find the sum to 'n' terms of 3.1^(2)+5.2^(2)+7.3^(2)+ ........

Find the sum to n terms of the series . 3 xx 1^(2) + 5 xx 2^(2) + 7 xx 3^(2) + . . . . . .

(b) Find the sum to n terms of the series 1 xx 2 xx 3 + 2 xx 3 xx 4 + 3 xx 4 xx 5 + .. .

Find the sum to 'n' terms of the series 1^(2)+3^(2)+5^(2)+.....+

Sum to n terms of 2+4+6+8 ..=

Find the sum of n terms of the series 1+4/5+7/(5^2)+10/(5^3)+dot

Find the sum of n terms of the series whose nth terms is (ii) n^(2)+3^(n) .

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OSWAAL PUBLICATION-SAMPLE PAPER 8-EXERCISE
  1. If (z-1)/(z+1) is purely imaginary, then |z|=

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  2. Find the term independent of x in the expansion of (3x^2-1/(2x^3))^10.

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  3. For what value of n,(a^(n+1)+b^(n+1))/(a^n+b^n) is the arithmetic mean...

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  4. In a class of 100 students 60 drinks tea. 50 drink coffee and 30 drink...

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  5. In a class of 100 students 60 drinks tea. 50 drink coffee and 30 drink...

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  6. Find the derivative of function x^n with respect to 'x' from first pri...

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  7. Find the co-ordinate of the focus ,equation of the directrix and lengt...

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  8. Insert 6 numbers between 3 and 24 so that the resulting sequence is an...

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  9. Verify by the method of contradiction that sqrt 11 is irrational.

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  10. 4 persons are selected at random from a group of 3 men , 2 women and...

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  11. 4 persons are selected at random from a group of 3 men , 2 women and...

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  12. Defiine a polynimial function.If the function from f:R rarr R is defin...

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  13. Prove that by using the principle of mathematical induction for all n...

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  14. A box contains 5 different red and 6 different white balls.In how many...

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  15. Using binomial theorem. Prove that 6^n-5n always leaves remainder 1 wh...

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  16. Derive a formula for the angle between two lines with slope m1 and m2....

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  17. If A+B+C=pi prove that "tan"A/2"tan"B/2+"tan"B/2"tan"C/2+"tan"C/2"tan"...

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  18. Find the sum of 'n' terms of 1.2 +2.3+3.4+4.5+……

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  19. Derive the equation of the ellipse in the form (x^(2))/(a^(2))+(y^(2))...

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  20. Differentiate the following function with respect to 'x':(sin x+cos x)...

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