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If the common difference of the AP is 5 then a 15 - a 11 is equal is |
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Answer» Answer: Step-by-step explanation: Hello ... Best way to solve sum is ... We know that Ap common difference is 5 ...we can use it ❣️❣️ The ap sequence looks LIKE a,a+d,a+2d,a+3d,..............,a+nd A 11 is equal to a+10d Same as ,A 15 is equal to a+14d ... Then a15 - a11 is equal to a+14d - ( a +10d) a+14d - a- 10d A GETS cancel ,,,,,14d - 10d 14× 5 - 10 ×5 70 - 50 = 20. Hope it will helps you ❣️ HIT thanks BUTTON if you will understand
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