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Find the 15th term of the AP −40,−15,10,35,…….

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350

310

260

210

answer is B.

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Detailed Solution

a = -40, d = -15 - (-40) = 25

a_{n} = a + (n - 1) d

\Rightarrow a_{15} = - 40 + 14 \times 25 = - 40 + 350 = 310

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