Write the value of a30 – a10 for the A.P. 4, 9, 14, 19, ……….
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a30 - a10 = 100
Step-by-step explanation:
Given: AP is 4, 9, 14, 19, ……….
Find: a30 – a10
a = 4
d = 9-4 = +5
a30 = a + 29d
a10 = a + 9d
So a30 - a10 = (29-9)d = 20d = 20(5) = 100
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