Question

if the 7 time 7 term of ap the 11 time 11 term show that 18 term is 0​

Answer 1

HEY mate

HERE'S YOUR ANSWER

Answer 2

Solution

Given :-   7 = 11

To prove :-  = 0 .

We have,  7 = 11

= 7( a + 6d ) = 11( a + 10d ) .

= 7a + 42d = 11a + 110d .

= 11a - 7a = 42d - 110d .

= 4a = - 68d .

= 4a + 68d = 0 .

= 4( a + 17d ) = 0 .

= a + 17d = 0/4 .

= a + ( 18 - 1 )d = 0.

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