Recent questions in Engineering Mathematics

2 votes
5 answers
8521
Two aeroplanes I and II bomb a target in succession. The probability of I and II scoring a hit correctly are 0.3 and 0.2 respectively. The second plane will bomb only if...
1 votes
2 answers
8522
1 votes
1 answer
8523
1 votes
1 answer
8524
7 votes
1 answer
8525
The number of bit strings of length $8$ that will either start with $1$ or end with $00$ is?$32$ $128$ $160$ $192$
0 votes
2 answers
8526
0 votes
2 answers
8529
A is a 4-square matrix and A_5 (a raised to the power of 5) = 0. Then A_4 =a) Ib) -Ic) 0d) A
1 votes
1 answer
8530
A be a n-square matrix with integer entries and B = A + 12 I. Then(a) B is idempotent      (b) B inverse exist(c) B is nilpotent       (d) B inverse is idempot...
1 votes
2 answers
8531
A is an upper triangular with all diagonal entries zero, then I+A is(a) invertible       (b) idempotent(c) singular        (d) nilpotent
1 votes
1 answer
8534
I'm having hard time understanding how following series converges ; 1 + 2/5 + 3/5^2 + 4/5^3 + 5/5^4 + ............ infinity
10 votes
3 answers
8535
The probability that two friends are born in the same month is ____ ?$1/6$$1/12$$1/144$$1/24$
1 votes
2 answers
8536
$X$ and $Y$ are non zero square matrices of order $n \times n$, such that $XY=O$Then, which of the following options is correct?$|X| = 0$ and $|Y| \neq 0$$|X| \neq 0$ and...
2 votes
1 answer
8537
If diagonal matrix is commutative with every matrix of same order then it is necessarily1)scalar matrix2)unit matrix3)symmetric matrix4)zero matrix
0 votes
2 answers
8538
If AB=BA then which of following are true?1)(A+B)(A-B)=A^2-B^22)(AB)^n=A^n B^n3)AB^n=B^n A4)A=I or B=I
3 votes
1 answer
8539
Express and form negation, so that no negation is to the left of the quantifier and express this negation in simple English.$$\unicode{x201C} {\small \text{Every student ...
1 votes
3 answers
8540
$$\lim_{x \to 0} \frac{\cos(x)-\log(1+x)-1+x}{\sin^2x} = ? $$Please explain the steps also