Question

two arithmetic progressions have the same common difference the first term of an arithmetic progression is -3 and that of the other is - 6 find the difference between the 5th terms​

Answer 1

Answer:

=> 5 * T5 = 7 * T7

=> 5{a + (5 - 1)d} = 7{a + (7 - 1)d}

=> 5(a + 4d) = 7(a + 6d)

=> 5a + 20d = 7a + 42d

=> 7a + 42d - 5a - 20d = 0

=> 2a + 22d = 0

=> 2(a + 11)d = 0

=> a + 11d = 0

=> a + (12 - 1)d = 0

=> T12 = 0

Answer 2

Answer:

see brother i am a 4 yrs old kid so I don't know your answer I am sorry