Question
Find $t_{21}$ if $S_{41}=4510$ in an A.P.

Answer

Get the step-by-step solution for this question inside the Vidyadip app.

Get the answer in the app

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

If Q(0, 1) is equidistant from P(5, -3) and R(x, 6), find the values of x. Also, find the distances QR and PR.
If the sum of roots of the quadratic equation is $\frac{1}{x+p}+\frac{1}{x+q}=\frac{1}{r}$ is zero, show that the product of the roots is $-\left(\frac{p^2+q^2}{2}\right)$.
Nalinitai invested ₹ 6024 in the shares of FV ₹ 10 when the Market Value was ₹ 60. She sold all the shares at MV of ₹ 50 after taking 60% dividend. She paid 0.4% brokerage at each stage of transactions. What was the total gain or loss in this transaction ?
Solve the following system of equations by the method of cross-multiplication:
$\text{ax}+\text{by}=\frac{\text{a}+\text{b}}{2}$
$3\text{x}+5\text{y}=4$
The product of two consecutive positive integers is $306$. Find the integers.
Determine the ratio in which the point $(-6, a)$ divides the join of $A(-3, 1)$ and $B(-8, 9)$. Also find the value of a.
Find the number of metallic circular discs with 1.5cm base diameter and of height 0.2cm to be melted to form a right circular cylinder of height 10cm and diameter
4.5cm.
Tickets numbered 2, 3, 4, 5, ..., 100, 101 are placed in a box and mixed thoroughly. One ticket is drawn at random from the box. Find the probability that the number on the ticket is:
  1. An even number.
  2. A number less than 16.
  3. A number which is a perfect square.
  4. A prime number less than 40.
A train covers a distance of $300\ km$ at a uniform speed. If the speed of the train is increased by $5\ km/hr$, it take $2$ hours less in the journey. Find the original speed of the train.