Class 11

Math

Algebra

Sequences and Series

The value of $x$ if $3,x,17$ are in AP

Connecting you to a tutor in 60 seconds.

Get answers to your doubts.

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 $cos2θ=2cos_{2}(4π +ϕ )$

Insert three arithmetic means between $23$ and $7$.

The minimum value of $4e_{x}+9e_{−X}$ is

the arethmetic mean of two positive numbers a and b is twice their GM then a:b is

If $x_{2}+y_{2}+z_{2}=1$ then the value of $xy+yz+zx$ lies in the interval