If an denotes the nth term of the AP 3, 8, 13, 18, … then what is the value of (a30 - a20) = ? (a) 40 (b) 36 (c) 50 (d) 56
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Answered by
17
Answer:given below
Step-by-step explanation: follow the steps.
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Answered by
9
Answer:
50
Step-by-step explanation:
an = a + ( n-1 ) × d
a = 3
d = 5
a30 = a + 29 × d
a20 = a + 19 × d
=} a30 - a20 = a + 29 × d - (a + 19 ×d)
= a + 29 × d - a - 19 ×d
= 29 × d - 19 × d
= 10 × d
= 10 × 5
= 50
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