Sequences and Series
The value of x if 3,x,17 are in AP
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A man travels m feet due north at 2 minutes per metre. He returns due south to his starting point at 2 metre per minute. The average rate in miles per hour for the entire trip is:
If sinβ is the geometric mean between sinα cosα then cos2β is equal to :
Insert 20 AM. between 2 and 86.
If sinθ is G.M of sinϕ and cosϕ , then prove that cos2θ =2cos2(4π +ϕ )
Insert three arithmetic means between 23 and 7.
The minimum value of 4ex+9e−X is
the arethmetic mean of two positive numbers a and b is twice their GM then a:b is
If x2+y2+z2=1 then the value of xy+yz+zx lies in the interval