Math, asked by simrangaddu51, 2 days ago

If t5=20, S15=210, find d and t15.

Answers

Answered by STARJOY15

0

Answer:

t(15) - t(11) = 12

a + 14d - [ a + 10d] = 12

a + 14d - a - 10d = 12

14d - 10d = 12

4d = 12

d = 12/4

d = 3

Common difference = 3

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