Question

find the 10th term from the last term of the AP 10,7,4,.............,-62​

Answer 1

Answer:

The sequence given is 10, 7, 4, ....-62.

First we need to find out number of terms in this sequence.

'a' = 10, 'd' = -3, last term = -62

t

n

=a+(n−1)d

⟹−62=10+(n−1)(−3)

⟹−62=13−3n

⟹3n=75orn=25.

The number of terms in the sequence is 25.

The 11th term from the end is same as the 15th term from the first.

So, t

15

=10+(15−1)(−3)

⟹t

15

=10+(14)(−3)

⟹t

15

=−32

.

The 11th term from the end is -32.

Step-by-step explanation:

#AKsneha

Answer 2

Answer:

-17

Step-by-step explanation:

a = 10

a+d = 7

using this, d = -3

Now, an = a+(n-1)d

We need n=10

So, a9 = a +9d

= 10 + 9(-3)

=10 + (-27)

= -17

I hope you understood it :)

Thank You!