Higher Math 1st Paper MCQ-Barishal Board-2021

1. If the function $f(x)$ is continuous at $x=b$ -

i. $f(b)$ is defined

ii. $\lim _{x \rightarrow b} f(x)$ does not exist

iii. $\lim _{x \rightarrow b} f(x)=f(b)$

Which one of the following is correct?

2. $\frac{d}{d x}\left(7^{2}\right)=$ what?

3. $A=\left[\begin{array}{rr}1 & 2 \\ 0 & -3\end{array}\right], B=$$\left[\begin{array}{ll}-2 & 3 \\ -1 & 4\end{array}\right]$.

$A + B=$ what?

4. Applicable for integration-

i. $f(x) d x=F(x)+c$ where $c$ is a constant of the integration

ii. $f(x)$ is called integrand

iii. $\frac{\mathrm{d}}{\mathrm{dx}}$ and $\int \mathrm{dx}$ is reverse process

Which one of the following is correct?

5. In which, interval the function f(x) = 2x-15x+36x+ 10 is decreases?