Question

the right word. These words are given in bracks
Serene
2.Complete each of the following sentences wins
but their spellings are jumbled.
(olobd)
a. The ink is as red as
olobd​

Answer 1

Answer:

njsjsksosspsppapsosowwop

Answer 2

Explanation:

${\huge{\underline{\underline{\sf{\maltese\; Question:-}}}}}✠Question:−</p><p></p><p>Q - If the 13th term of an A.P. is 21 , then the sum of the first 25 terms would be ?</p><p></p><p>{\huge{\underline{\underline{\sf{\maltese\;Answer\checkmark}}}}}✠Answer✓</p><p></p><p>★ Given :</p><p></p><p>13 th term (a_{13}a13 ) = 21</p><p></p><p>★ To Find :</p><p></p><p>Sum of first 25 terms (S_{n}Sn )</p><p></p><p>★ Solution :</p><p></p><p>Using the Formula ↓</p><p></p><p>\rm \: a _{n} = a + (n - 1)dan=a+(n−1)d</p><p></p><p>so , for 13th term ,</p><p></p><p>n = 13</p><p></p><p>\rm \: 21 = a + 12d21=a+12d</p><p></p><p>\mapsto \rm \: a = 21 - 12d....(i)↦a=21−12d....(i)</p><p></p><p>Now ,</p><p></p><p>Using the Formula ↓</p><p></p><p>\begin{gathered} \rm \: s _{n} = \frac{n}{2} (2a + (n - 1)d) \\ \end{gathered}sn=2n(2a+(n−1)d)</p><p></p><p>Here ,</p><p></p><p>As we have to find the sum of first 25 terms so ,</p><p></p><p>n = 25</p><p></p><p>\begin{gathered} \rm \: s_{25} = \frac{25}{2} (2a + (25 - 1)d) \\ \end{gathered}s25=225(2a+(25−1)d)</p><p></p><p>Put the value of a from eq(i)</p><p></p><p>\begin{gathered} \rm \: s_{25} = \frac{25}{2} (2 \times (21 - 12d) + 24d) \\ \end{gathered}s25=225(2×(21−12d)+24d)</p><p></p><p>\begin{gathered} \rm \: s _{25} = \frac{25}{2} (42 - \cancel{24d} + \cancel{ 24d}) \\ \end{gathered}s25=225(42−24d+24d)</p><p></p><p>\begin{gathered} \mapsto \rm \: s_{25} = \frac{25}{ \cancel2} \times \cancel{42} \\ \end{gathered}↦s25=225×42</p><p></p><p>\mapsto \rm \: s _{25} = 25 \times 21↦s25=25×21</p><p></p><p>\large \mapsto \boxed{\rm \: s_{25} = 525}↦s25=525</p><p></p><p>So ,</p><p></p><p>The sum of first 25 terms would be 525 .</p><p></p><p>$