The first term of an $A.P. $ is $2$ and common difference is $4$. The sum of its $40$ terms will be
The first term of an $A.P. $ is $2$ and common difference is $4$. The sum of its $40$ terms will be
- A
$3200$
- B
$1600$
- C
$200$
- D
$2800$
Similar Questions
If the sum of first $n$ terms of an $A.P.$ is $cn(n -1)$ , where $c \neq 0$ , then sum of the squares of these terms is
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The number of terms common to the two A.P.'s $3,7,11, \ldots ., 407$ and $2,9,16, \ldots . .709$ is
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- [JEE MAIN 2020]
If the sum of $\mathrm{n}$ terms of an $\mathrm{A.P.}$ is $n P+\frac{1}{2} n(n-1) Q,$ where $\mathrm{P}$ and $\mathrm{Q}$ are constants, find the common difference.
If the sum of $\mathrm{n}$ terms of an $\mathrm{A.P.}$ is $n P+\frac{1}{2} n(n-1) Q,$ where $\mathrm{P}$ and $\mathrm{Q}$ are constants, find the common difference.
Write the first five terms of the following sequence and obtain the corresponding series :
$a_{1}=-1, a_{n}=\frac{a_{n-1}}{n}, n\, \geq\, 2$
Write the first five terms of the following sequence and obtain the corresponding series :
$a_{1}=-1, a_{n}=\frac{a_{n-1}}{n}, n\, \geq\, 2$
Insert five numbers between $8$ and $26$ such that resulting sequence is an $A.P.$
Insert five numbers between $8$ and $26$ such that resulting sequence is an $A.P.$