Question

please solve it fastly it is very urgent ​

Answer 1

Answer:

0×25 root×11

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

We are given,

a(4th) = 0

We know that,

a(nth) = a + (n - 1)d

Let the 1st term be a and common difference be d

So,

a(4th) = a + (4 - 1)d

0 = a + 3d

a + 3d = 0

a = -3d ----- 1

Now, similarly,

a(25th) = a + (25 - 1)d

a(25th) = a + 24d

From eq.1 we get,

a(25th) = (-3d) + 24d

a(25th) = 21d ----- 2

And,

a(11th) = a + (11 - 1)d

a(11th) = a + 10d

From eq.1 we get,

a(11th) = (-3d) + 10d

a(11th) = 7d ----- 3

Now, if we observe closely,

From eq.2 and eq.3

21d = 3 × 7d

∴ a(25th) = 3 × a(11th)

Hence proved

Hope it helped and believing you understood it........All the best