Question

the 15th term of an ap is 30.if the first term and the common differences are equal then find the first term​

Answer 1

Given -

a = d

15th term = 30

using formula for nth term,

15th term = a + 14d

30 = a + 14a {a=d}

30 = 15a

a = 2

${\huge{\boxed{First Term = 2}}}$

Answer 2

Answer:

Given -

a = d

15th term = 30

using formula for nth term,

15th term = a + 14d

30 = a + 14a {a=d}

30 = 15a

a = 2

{\huge{\boxed{First Term = 2}}}

FirstTerm=2