Question

if the sum of 14 term of an ap is 1050 and its first term is 10 find the 20th term

Answer 1

Hi

Here is ur answer

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Answer:

           a ₂₀ = 200

Step-by-step explanation:

a=10

S₁₄=1050

           n/2 [2a+(n-1)d] = 1050

            14/2 [20+13d] = 1050

                 7 [20+13d] = 1050

                     20+13d = 1050/7

                     20+13d = 150

                            13d =1 50-20

                            13d = 130

                               d=10

a ₂₀ = a+19d

                 = 10+19×10

                 = 10+190

                 = 200

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Hope it helps U