Question

Find the sum of Frist 10 term of an AP whose 1 term is 100 and 10 term is 1000

Answer 1

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in this question ,we have to find the common defference

solution:-

shown in attachment

hence.

the common defference of A.P is = -10 answer

## hope it helps##

Answer 2

Answer:

5500

Step-by-step explanation:

Given:- a1=100 a10=1000

:.a=100 d=100

S = 10÷2 (2(100)+(10-1)100)

= 5(1100)

=5500