Question

20+
... (Formula)
... (Substituting the values)
S., - - 2+1
.: 5125 =(22+40d)
... 5125=41 x
.. a +20d=
..a +20 d=125
.. (1)
Now, 21st term is tar
.. (Formula)
.. 121 = a +(21 - 1) d
.: 121 = a + 20 d
=[
.: 121
... [From (1)]​

Answer 1

Answer:

20+

... (Formula)

... (Substituting the values)

S., - - 2+1

.: 5125 =(22+40d)

... 5125=41 x

.. a +20d=

..a +20 d=125

.. (1)

Now, 21st term is tar

.. (Formula)

.. 121 = a +(21 - 1) d

.: 121 = a + 20 d

=[

.: 121

... [From (1)]