Find the value of `overset(10)underset(i=1)sum(10xxi)`.

The value of overset(1)underset(-1)intx|x|dx is

find the value of overset(2)underset(1)int 5x^2dx .

Fill in the blanks Value of overset(3)underset(I = 1)sum 10i^3 is______.

Find the value of overset(pi//2)underset(0)int (1 )/((b^2 cos^2 x + a^2 sin^2 x)) dx

The value of overset (pi) int underset(0)''cosx|dx is

Find the value of underset(r = 1)overset(10)sum underset(s = 1)overset(10)sum tan^(-1) ((r)/(s))

Find the value of underset(r = 0) overset(oo)sum tan^(-1) ((1)/(1 + r + r^(2)))

Evaluate: overset(2)underset(1)int logx dx

evaluate overset(1)underset(-1)int (2x+3)/(4)dx

If R_(1) is the circumradius of the pedal triangle of a given triangle ABC, and R_(2) is the circumradius of the pedal triangle of the pedal triangle formed, and so on R_(3), R_(4) ..., then the value of underset( i=1)overset(oo)sum R_(i) , where R (circumradius) of DeltaABC is 5 is