Given S -n-2-2a - n - 1d- If S- 185- n - 10 and d - 3- then value of a is

The correct option is C 5 given equation S = n 2 [2a+(n 1)d] we are also given that S=185, n=10 and d=3 Substitute the above values in the g ...

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Solving Equations with Variables on Both Sides

Given S =n/...

Question

Given $S = \frac{n}{2} [2 a + (n - 1) d]$ . If $S = 185, n = 10$ and $d = 3$ , then value of $a$ is

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S = \frac{n}{2} [2 a + (n - 1) d]

d

a = 8, S = 380

n = 10

s = \frac{n}{2} [2 a + (n - 1) d]

^{'} d^{'}

s = 144, a = 1

n = 12

s = \frac{n}{2} [2 a + (n - 1) d]

n = 4, l = 0, m = 0, s = + \frac{1}{2}

n = 3, l = 2, m = + 1, s = - \frac{1}{2}

n = 3, l = 2, m = - 1, s = + \frac{1}{2}

n = 3, l = 1, m = 0, s = + \frac{1}{2}

n = 5, l = 2, m = + 1, s = - \frac{1}{2}

In a series if (i) T_n = 2n − 1 find S₅ (ii) T_n = (−1)ⁿ then find (a) S₁ (b) S₂ (c) S₃ (d) S₄

Hence prove that S₁ = S₃ and S₂ = S₄

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