Question

Find the 19th term of the AP: -12 , -7, -2 , 3 pls answer

Answer 1

Answer:

19th term = 78

Step-by-step explanation:

given AP,   -12 , -7, -2 , 3

=> a = -12 (first term)  & d = t₂-t₁ = -7 - (-12) = -7+12 = +5

we know, tₙ = a + (n-1)d

so, the 19th term = t₁₉ = -12 + (19-1)5

                                    = -12 + 18*5

                                    = -12 + 90

                                    = 78

=> 19th term = t₁₉ = 78