`1/8+1/18=`

The sum of tan ^(-1) (1)/(2)+tan ^(-1) (1)/(8)+tan ^(-1) (1)/(18)+.. is

Find the sum of the series tan^(-1) 1/2+tan^(-1) 1/8+tan^(-1) 1/18+tan^(-1) 1/32+...oo

The next term of the sequences (3)/(16), (1)/(8), (1)/(12), (1)/(18),…

If cot^-1 7 + cot^-1 8 + cot^-1 18 = cot^-1 k , then k is

Prove that cot^-1 7 + cot^-1 8 + cot^-1 18 = cot^-1 3

Simplify (9.6xx3.6+7.2+10.8" of "(1)/(18)-(1)/(10))

Which is greater ? 1.8 or 1.80

Simplify: 18""1/2+8""1/3+7""1/7

If the mapping f(x)=ax+b, agt0 maps [-1,1] onto [0,2] then [cot^-1 7+cot^-1 8+cot^-1 18]= (A) f(1) (B) f(0) (C) f(2) (D) f(-1)