If $a,b,c,d,e$ are in $A.P.$ then the value of $a + b + 4c$ $ - 4d + e$ in terms of $a$, if possible is
$4a$
$2a$
$3$
None of these
(d) It is not possible to express $a + b + 4c – 4d + e$ in terms of $a.$
If the sum and product of the first three term in an $A.P$. are $33$ and $1155$, respectively, then a value of its $11^{th}$ tern is
Three number are in $A.P.$ such that their sum is $18$ and sum of their squares is $158$. The greatest number among them is
If the ${p^{th}}$ term of an $A.P.$ be $\frac{1}{q}$ and ${q^{th}}$ term be $\frac{1}{p}$, then the sum of its $p{q^{th}}$ terms will be
The sum of the integers from $1$ to $100$ which are not divisible by $3$ or $5$ is
Write the first five terms of the following sequence and obtain the corresponding series :
$a_{1}=3, a_{n}=3 a_{n-1}+2$ for all $n\,>\,1$
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