Find the sum of 1 + 5 + 12 + 22 + 35 +…....

Find the sum of 1 + 5 + 12 + 22 + 35 +….upto n term.

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 5-EXERCISE

If z = x + iy and arg ((z-1)/(z+1))=(pi)/(4), then the locus of (x, y)...
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If the co-efficient of the (3r+1) th term is equal to the co-efficient...
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Find the sum of 1 + 5 + 12 + 22 + 35 +….upto n term.
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A straight line passes through A(1, 2) and makes an angle theta with t...
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Find the equations of the lines, which cut-off intercepts on the axes ...
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The equation of circum circle of an equilateral triangle is x^2+y^2+2g...
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A straight line passes through (h, k) and the middle point of the also...
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Evaluate :lim(xrarr0)(tan2x-x)/(3x-sinx)
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From definition, differentiate cos4x at 'x=pi/6,will respect to x.
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Prove the following by contradiciton ."The sum of a rational and an ir...
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Show that sqrt7 is an irrational, (use the method of contradiction)
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If the variance of lst.n even natural numbers is 65, find the value of...
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In on examination the probability of a student passed in physics is 2/...
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If p sin (alpha+beta) = cos (alpha -beta), show that1/(1-p sin 2alpha)...
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Solve :sqrt(2cos^2x+1)+sqrt(2sin^2x+1)=2sqrt2
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Exhibit graphically the solution region of the following system of 'in...
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If the roots of the equation qx^2 + 2px + 2q =.0 are real and unequal ...
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Solve:6x^2-(18+5i)x+18+i=0
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Out of 17 comodities 12 are same type and 5 are different type. Find t...
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Show that x = ay^2 + by + c represents the equation of a parabola. Fin...
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