Sequences and Series
If the sum of the first n terms of an A.P. is given by the equation n2+7n, then what is the first term and second term?
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If a,b and c are positive and 9a+3b+c=90 then the maximum value of (loga+logb+logc ) is (Base of the logarithm is 10)
Let x be the arithmetic mean and y,z be the two geometric means between any two positive numbers. Then xyzy3+z3 = __________.
Find x, if the given numbers are in A.P. 5, (x−1), 0
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If x2+y2+z2=1 then the value of xy+yz+zx lies in the interval