. . . must be taken so that their sum is 78?

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How many terms of the AP : 24, 21, 18, . . . must be taken so that their sum is 78?
04
Oct
How many terms of the AP : 24, 21, 18, . . . must be taken so that their sum is 78? . . . must be taken so that their sum is 78? 18 21 How many terms of the AP : 24 October 4, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths [...]
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Tags: . . . must be taken so that their sum is 78? , 18 , 21 , How many terms of the AP : 24 ,