Question

in an ap common difference is 6 and 7th term is 135 then find the first term

Answer 1

Common difference ( d ) = 6

First term ( a )

an = a + ( n - 1 )d

a7 = a + 6 × 6

135 = a + 36

99 = a

Answer 2

Hi....✌️✌️

Here is your answer...

$common \: diff. \: \: d = 6 \\ \\ a _7 = 135 \\ \\ a + 6d = 135 \\ \\ a + 6 \times 6 = 135 \\ \\ a + 36 = 135 \\ \\ a = 135 - 36 \\ \\ a = 99$

Hence first term of AP is 99

✌️✌️