Find six arithmetic means between -3 and 18

The following number are true if a,b,c are any real number except

Obtain the common ratio of the sequence 1,12,14,18,116,...

The first term of an AP is 7 and the last term is 70 and the sum of the series is 385. Find the common difference

The first and last terms of a geometric series are 2 and 2048 respectively. The sum of the series is 2730, find the number of terms.

Solve the equation ax2+bx+c=0

Determine the roots of x2-6x+9=0

Evaluate ∑r=372r

Determine the third term of the sequence Ur=3Ur-1-Ur-2if the first two terms are 1 and 3

Find the equations in x whose roots are -5 and 5