`(- 1) × (- 1) × (- 1) × …… 2m ` times, where m is a natural number, is equal to
(a)1 ,
(b)-1
(c) 1 or -1
(d) none​

The smallest natural number is (a) 0 (b) 1 (c) -1 (d) None of these

The predecessor of 1 in natural number is 0 (b) 2(c)-1 (d) None of these

tan^(-1)1/(11)+tan^(-1)2/(11) is equal to (a) 0 (b) 1//2 (c) -1 (d) none of these

(1)/(1)+(1)/(1+2)+(1)/(1+2+3)+.........2020 terms =(m)/(n) where m, n are coprime natural numbers then (m)/(n-1) is equal to (1) 1 (2) 2 (3) 3 (4) None of these

The smallest whole number is 0 (b) 1(c)-1 (d) None of these

IF A = [(1,0),(1,1)] then for all natural numbers n A^n is equal to (A) [(1,0),(1,n)] (B) [(n,0),(1,1)] (C) [(1,0),(n,1)] (D) none of these

If A is an invertible matrix then det(A^-1) is equal to (A) 1 (B) 1/|A| (C) |A| (D) none of these

If a^(1/m) = b^(1/n) = c^(1/p) and abc = 1 , then m + n + p is equal to :

The value of int_(1)^(oo)[cos ec^(-1)x]dx .(where [.] denotes greatest integer function),is equal to (A) cos ec1-1(B)1(C)1-sin1(D) none of these

The value of tan(sin^(-1)(cos(sin^(-1)x)))tan(cos^(-1)(sin(cos^(-1)x))), where x in(0,1) is equal to 0(b)1(c)-1(d) none of these